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Home » Recipes » Almond Flour

Low Carb Lemon Mug Cake Mix (Sugar-free Lemon Cake Mix)

By Kim Hardesty

Having this sugar-free lemon cake mix on-hand to make low carb lemon mug cakes in the morning is a game-changer! Save time by having your ingredients together beforehand. Fast and easy to make, you won't believe the incredible moist texture this mix produces.

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This low carb mug cake recipe uses a homemade sugar-free lemon cake mix for a fast low carb breakfast treat!

I'm always looking for ways to streamline the morning routine. Getting the kids ready for school can easily become hectic if I'm feeling tired and my mind is not firing on all cylinders. Invariably, the first question out of my daughter's mouth in the morning is, "Mom, what's for breakfast?"

Some days it's challenging to find two brain cells to rub together to even think about making breakfast. On those days I like to make low carb mug cakes, or what some people call mug muffins, or mug cakes. We have been enjoying low carb chocolate mug cakes at breakfast for a few years now.

I pre-mix all of the ingredients for a sugar-free chocolate cake mix and then keep it in the pantry. I just measure my ingredients, add an egg and a little coconut milk, stir and pop it in the microwave. Breakfast is ready in under two minutes. It's a no-brainer when I have no brain!

Having a big batch of low carb lemon mug cake mix comes in handy for more than breakfast. I have been known to slice a minute muffin horizontally and use it as sandwich bread (no, not this lemon cake version - the chocolate one). It has saved me on the occasion I have forgotten to make gluten-free bread or just refuse to pay the price for another loaf of Udi.

I've also used it as a snack in the kids lunch boxes when I find we're out of fruit or traditional snacks. And it's a pretty healthy alternative to regular breads, cakes and muffins because it has some fiber, some protein, some healthy fats, and is very low in sugar. Well, then I go and spoil it by putting jam on it.

This low carb mug cake recipe uses a homemade sugar-free lemon cake mix for a fast low carb breakfast treat!

These low carb lemon mug cakes are really yummy. My mom was so impressed with the light, tender texture that she asked me if there was anything weird in them. By weird she meant any alternative ingredients. Well, yeah... Low carb and gluten-free baking equals weird ingredients sometimes and sometimes weird results, but not with the recipe.

This sugar-free lemon cake recipe uses an important ingredient to get that burst of lemon flavor- Real Lemon packets. It's crystallized lemon juice. I often use it when I need a lemon flavor and don't have fresh lemons in the house. It was perfect in this lemon mug cake. Because the lemon is already in the mix, you won't have to fool with cutting and squeezing fresh lemons in the morning. The acid in the Real Lemon crystals contributes to such an amazing texture. You'll swear you were eating cake.

If you follow a low carb diet and are looking for a new minute muffin recipe or are just looking for a quick low carb breakfast option, it couldn't get any easier or tastier than this recipe. For a great Paleo chocolate mug cake recipe, try this one from WholesomeYum.

Low Carb Lemon Mug Cake Mix - (Sugar-free Lemon Cake Mix) is 3 net carbs per servings.

[Disclosure: This recipe contains affiliate links.]

All you need is an egg, some coconut milk and a fork, for the world's fastest lemon muffin! Low Carb & gluten-free

Low Carb Lemon Mug Cake (Sugar-free Lemon Cake)

Having this sugar-free lemon cake mix on-hand to make low carb lemon mug cakes in the morning is a game-changer! Save time by having your ingredients together beforehand. Fast and easy to make, you won't believe the incredible moist texture this mix produces.
5 from 8 votes
Print Pin Rate
Course: Bread, Breakfast
Cuisine: American
Prep Time: 5 minutes minutes
Cook Time: 1 minute minute
Total Time: 6 minutes minutes
Servings: 16 servings
Calories: 162kcal
Author: lowcarbmaven.com

Ingredients

Lemon Minute Muffin Master Mix

  • 4 cups Almond Flour
  • ⅔ cup Coconut Flour
  • ½ cup whey protein powder (I like Isopure zero carb)
  • 1 ½ cups erythritol
  • 1 tablespoon baking powder
  • 1 teaspoon baking soda
  • zest from two lemons (completely dried)
  • ½ teaspoon salt
  • 12 packets True Lemon

To Make A Muffin

  • ½ cup Lemon Minute Muffin Master Mix
  • 1 large egg
  • 1-2 tablespoon full fat coconut milk (or heavy cream or oil)

Instructions

For the Mix:

  • Zest two lemons and leave the zest on a plate to dry all day.
  • Measure all of the ingredients into a large bowl. Stir with a whisk to break up any lumps and to evenly distribute all ingredients.
  • Put the Lemon Minute Muffin Master Mix into an air tight container. When the zest is dry, crumble it with your fingers and add it to the mix.

For the Muffin:

  • Measure ½ cup of mix into a large mug or a bowl. Add the egg and coconut milk or oil and mix until all of the dry ingredients are completely incorporated. Let the mug or bowl sit on the counter for a minute to activate the acid in the dried lemon juice. 
  • Cook your minute muffin for a minute or more. Mine takes one minute and twenty seconds. You'll be surprised how much this is like cake!
  • Each muffin serves 2 and the nutritional information is for 1 serving or ½ of a muffin.

Notes

If you want the mix to be sweeter, add ½ teaspoon of powdered stevia (I use KAL) or more erythritol.
Nutrition Facts
Low Carb Lemon Mug Cake (Sugar-free Lemon Cake)
Amount Per Serving
Calories 162 Calories from Fat 126
% Daily Value*
Fat 14g22%
Carbohydrates 6g2%
Fiber 3g13%
Protein 3g6%
* Percent Daily Values are based on a 2000 calorie diet.

Nutrition

Calories: 162kcal | Carbohydrates: 6g | Protein: 3g | Fat: 14g | Fiber: 3g

About Kim Hardesty

Kim is a self taught cook with over 30 years experience in the kitchen. She develops and tests low carb and keto recipes in her California home. She began her low carb journey in 2009 and at the urging of friends, started blogging in 2014. Kim shares delicious low carb and keto recipes no one would believe are sugar-free. Her recipes are featured in newsstand publications and on sites all over the internet.

View all posts by Kim Hardesty | Website | Facebook | Instagram | Pinterest

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  1. Jane Norton

    July 31, 2021 at 9:29 am

    Hi, Kim. Can I make this with sucralose and if so, should I use the same amount?

    Reply
    • Kim Hardesty

      July 31, 2021 at 5:15 pm

      Hi Jane. Try the same amount and taste to see if you need more. -Kim

      Reply
  2. Jenny

    June 17, 2020 at 7:33 am

    Hi Kim! I found this recipe after loving your chocolate mug cake. I have two questions on this one - could I use egg white powder in place of the whey isolate to be dairy free? Also, would this recipe benefit from the use of mayo similar to the chocolate one? Thanks for your help. I love all the small serving desserts.

    Reply
    • Kim Hardesty

      June 17, 2020 at 11:00 am

      Hi Jenny. I have never tried using egg white powder in lieu of protein powder so I can't answer that. I am currently in the middle of preparing my house for an out of state move and can't test that for you. I won't be able to do any testing for a month or two. Sorry about that. -Kim

      Reply
  3. Ron

    March 13, 2020 at 2:01 pm

    Do you happen to have a batch recipe for chocolate?
    LOW CARB CHOCOLATE MUG CAKE MIX (SUGAR-FREE LEMON CAKE MIX)

    Reply
    • Kim Hardesty

      March 14, 2020 at 10:54 am

      Hi Ron, no I don't BUT if you use the recipe scaler and it will scale it up for you. Just make sure to make a single portion of ingredients first, so that you know how much to measure when making an individual cake. -Kim

      Reply
      • Ronald

        March 14, 2020 at 2:31 pm

        Kim thank you for the quick response. I will give it a try,

        Reply
  4. Vicky

    November 18, 2018 at 11:00 pm

    Changing the servings to 2
    how do I measure .08 coconut flour and .06 protein powder?
    Is the protein powder necessary? If not should I substitute something ?

    Reply
    • Kim

      November 19, 2018 at 6:53 am

      Hi Vicky, I see the problem. I didn't know that the recipe scaling function did that. The person who wrote the recipe card is in Europe and is not familiar with our measuring system in America. Let me give you some information to help you. I am in Costa Rica right now and not connected with some of my programs.....

      3 teaspoons = 1 tablespoon
      4 tablespoons = 1/4 cup
      5 1/2 tablspoons (16 1/2 teaspoons) = 1/3 cup

      I hope this helps you figure out a smaller portion size. I will connect with the program developer to see if we can fix this problem. Thank you for bringing it to my attention. -Kim

      Reply
    • Kim

      November 19, 2018 at 6:54 am

      Oops! I forgot to answer your other question. The protein powder gives the mug cake a very nice texture. You can try subbing some coconut flour. -Kim

      Reply
    • Vanessa

      May 09, 2019 at 10:45 am

      Hi there! What is the shelf life of this mix? Will it also work if I use pre-dried lemon peel like McCormix makes?

      Reply
      • Kim

        May 09, 2019 at 4:13 pm

        Hi Vanessa. The mix will keep in the fridge indefinitely. The pre-dried lemon peel is not very good in this recipe. -Kim

        Reply
  5. Suzanne

    October 29, 2018 at 4:21 pm

    OMG! So yummy, easy, and quick! This is a keeper!

    Reply
  6. Stephanie

    October 26, 2018 at 12:12 pm

    Thank you - it's delicious!

    Reply
  7. Lisa

    August 28, 2018 at 6:08 pm

    Oh yeah! This is delicious! Gotta go. Can't type and eat. One is clearly more important right now.

    Reply
  8. Janey

    May 19, 2018 at 5:11 am

    Mmmm!

    Reply
  9. Beverly

    May 06, 2018 at 7:37 am

    I love the opportunity to make the chocolate, lemon mug cakes but sorry to say I do not understand the ingredient amounts as written. For example:
    0.08 cup Coconut Flour
    0.06 cup whey protein powder
    0.19 cups erythritol
    0.13 tablespoon baking powder
    0.13 teaspoon baking soda
    0.06 teaspoon salt
    0.06 cup Lemon Minute Muffin Master Mix
    0.13-0.25 tablespoon
    I read carefully your conversion chart. Am I to 'tar' the scale with a cup and weigh .08 coconut flour, for example?
    The same for a tablespoon and then a teaspoon? That seems awkward.
    Please explain. Thank you,
    Beverly

    Reply
    • Kim

      May 07, 2018 at 9:04 am

      Hi Beverly, you must be talking about scaling the recipe which is a feature when clicking the up/down arrow on the recipe servings. I have never used the scaler, so I wasn't sure of what you were speaking at first. How many servings are you trying to scale it back to and maybe I can help. -Kim

      Reply
      • Beverly

        May 07, 2018 at 6:12 pm

        two servings - but the amounts are either strange or I do not know how to read them.
        thank you for helping

        Reply
        • Kim

          May 08, 2018 at 9:39 am

          It's not you, Beverly, I'm not sure why the recipe scales that way. It's very weird! Maybe it's because the program developer is European and used to metric. In any case, I can get you down to 4 servings. Just divide the amount in half to make a large muffin and follow the instructions, or divide the mix into quarters and mix with 1 egg yolk one time and the next time the egg white so that you don't end up wasting ingredients. Does that make sense?

          1 cup almond flour
          3 Tbsp coconut flour
          2 Tbsp protein powder
          1 tsp baking powder
          1/4 tsp baking soda
          zest from 1/2 lemon
          pinch salt
          3 packets Tru Lemon

          Reply
          • Beverly

            May 08, 2018 at 4:31 pm

            Thank you for understanding my puzzle about amounts.
            I will use your amounts - can't wait for the lemon - my favorite.

  10. Yolie

    May 02, 2018 at 5:35 pm

    Kim, just wanted to say that you have great recipes!! love them, and especially they are all low carb! thank you so much for all of them!!

    Reply
    • Kim

      May 03, 2018 at 4:02 pm

      That is so nice, Yolie. Thank you so much. -Kim

      Reply
  11. Mary Jo Stamper

    November 09, 2017 at 5:38 pm

    Totally addicted to this...do you have any other master mix recipes? So convenient!

    Reply
    • Kim

      November 10, 2017 at 1:02 pm

      I love this, too, Mary. Thanks so much for commenting. This recipe was not popular so I didn't share any of my other mix recipes. I had a chocolate one, too. -Kim

      Reply
  12. Meredith

    May 23, 2017 at 12:29 pm

    Hi there - any chance you could provide the ingredients for just 1 serving, seems a little rough to divide everything by 16. Thanks!

    Reply
    • Kim

      May 23, 2017 at 1:27 pm

      Hi Meridith, hover over the serving size and choose how many servings you need. The recipe program will calculate it for you. I suggest choosing 2 servings and cutting the muffin in half as I intended. -Kim

      Reply
  13. Wendy

    August 20, 2016 at 11:46 am

    "I'm in love! I'm in love and I don't care who knows it!"
    - Elf

    "So I will eat them in a box
    And I will eat them with a fox."
    -Dr. Seuss

    Need I say more?! Yes! I love them! So why don't I marry them, you may be thinking. Well, I'm already married. But if my husband kicks it before me...

    Reply
    • Kim

      August 20, 2016 at 12:12 pm

      Thanks Wendy (or should I say Buddy?). That movie rocks. Thanks again and have a wonderful weekend. -Kim

      Reply
  14. Sarah C

    August 20, 2016 at 7:14 am

    My son is a Starbucks Lemon Loaf fanatic and ever since going Low Carb has missed it terribly - until now. He says "it's not EXACTLY the same but it's pretty close!" I love it too and don't feel bad letting him have his "lemon cake" now.

    Reply
    • Kim

      August 20, 2016 at 8:03 am

      Sarah, I'm so glad your son has an acceptable Lemon Loaf replacement. Starbucks has had some hits over the years! Thanks so much for taking the time to leave a message. Have a wonderful weekend. -Kim

      Reply
  15. Pan

    February 28, 2016 at 9:39 pm

    Hi there! I'd love the recipe for the chocolate cake master mix you mention here. I see the chocolate muffin master mix recipe, but not the cake. Thanks!

    Reply
    • Kim

      February 29, 2016 at 6:26 am

      Hi Pan. I haven't made than in a long time because I am always working on new recipes. I will look for the recipe and give it a whirl in the next week or so. Thanks for your comment! -Kim

      Reply
      • Wendy

        August 20, 2016 at 10:13 am

        Okay, it's been over a week or so. Did you do the chocolate muffin mix yet? A girl's gotta have her chocolate!

        Reply
        • Kim

          August 20, 2016 at 12:11 pm

          Oh, actually Wendy, I did one for Sukrin USA. The recipe is on their site. It uses peanut flour and cocoa powder and is really nice - just like a nice light cake. Check it out and see what you think. There are actually two recipes: one for a peanut butter mug cake and one for a chocolate mug cake. You can always double and triple the ingredients to get more servings. Let me know if those recipes don't interest you.

          Reply
          • Wendy

            August 20, 2016 at 4:59 pm

            Hmmm... I'm not finding either recipe there. Am I search challenged? Help!

          • Kim

            August 20, 2016 at 6:32 pm

            Sure Wendy. I forgot to tell you that they were on the Sukrin USA blog. Here's the link: http://sukrinusa.com/guest-post-peanut-flour-mug-cake/

          • Wendy

            August 20, 2016 at 5:04 pm

            Ha! I did a search on your site and found it! They won't keep me from my chocolate! Uh, I mean, the recipe looks lovely and I do enjoy chocolate. Ahem.

          • Kim

            August 20, 2016 at 6:34 pm

            Haha! I'm glad you found it Wendy. I hope you like them. If you were looking for something different, let me know! -Kim

  16. Angela

    February 16, 2016 at 8:18 am

    Where do you buy the packets of true lemon? And if I wanted to use real fresh squeezed lemon juice, how much?
    Thank you

    Reply
    • Kim

      February 16, 2016 at 8:32 am

      Hi Angela. I used to buy True Lemon in the grocery store but now buy from netrition.com. I specifically used the dried lemon juice so that this could be kept as a mix and one would only have to add coconut milk and an egg. I haven't tried it with fresh lemon juice but suggest trying 2 teaspoons - 1 tablespoon per muffin. I'd be interested to hear how it goes. Will you post back if you try it and how much lemon juice you thought was right? It may help someone else...

      Incidentally, I use the packets to make my kids lemonade without the mess and sometimes add a packet to my water or use it to 'brighten" a recipe if I am out of lemons. Thanks for your question. Have a great week. -Kim

      Reply
  17. Cyndi

    June 24, 2015 at 7:30 am

    theres a reference to a master mix (non lemon) but I can't find it. Do you have a link to it?

    Reply
    • Kim

      June 24, 2015 at 7:37 am

      Hi Cindy, are you speaking about the chocolate mix I mention in the post? I haven't written a post about it nor taken photos, yet. But if you are interested, I will get working on it. Let me know. - Kim

      Reply
  18. Michelle @ Modern Acupuncture

    February 24, 2015 at 11:56 am

    Beautiful photos! I love the ease of having the mix pre-made. What a great idea! Especially for mornings when I'm in a rush and don't know what to have for breakfast. Where did you get that gorgeous turquoise mug?

    Reply
    • Kim

      February 24, 2015 at 12:42 pm

      Thanks, Michelle! Any time-saver is alright in my book! I LOVE that mug. I got it at Home Goods. Thanks for visiting.
      -Kim

      Reply

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