Blackberry Custard Pie - Buttermilk Custard Pie Recipe (Sugar-free, Low Carb)

Blackberry Custard Pie - Easy Buttermilk Pie Recipe (Sugar-free, Low Carb)

Blackberry custard pie features an easy buttermilk custard pie filling in a pre-baked pie crust with fresh blackberries. This no-bake pie recipe cooks in minutes and is sugar-free.
Course Dessert
Cuisine American
Keyword no-bake
Prep Time 10 minutes
Cook Time 10 minutes
Total Time 20 minutes
Servings 10
Calories 355kcal




  • Sprinkle gelatin over 1 tablespoon water to bloom. Measure sweetener, salt and xanthan gum in a 4-6 cup capacity non-reactive metal pot. Add the eggs and yolks and whisk together until completely combined. Whisk in the buttermilk and heavy cream. 


  • Place the pot over medium heat, whisking constantly until the mixture begins to thicken - about the 5 minute mark if using Tagatesse (or sugar) and 8 minutes for Sukrin :1 or Swerve. Turn the heat down to medium low and whisk vigorously for 1 minute. (The custard should bubble lazily if whisking stops.) Remove from heat and whisk for  1 1/2 minutes more. Tear the gelatin into pieces and drop into the custard, stirring until dissolved. Add vanilla and nutmeg, stirring to blend.


  • Let the mixture cool just slightly then pour into pre-baked pie crust. Level the top and arrange black berries, pushing them into the custard until they are at least 1/2 way submerged. Refrigerate uncovered for several hours before covering with cling film. Chill at least 6 hours before slicing and serving.

Optional Step

  • Sprinkle Tagatessse [Sukrin Melis, Swerve Confectioners (or powdered sugar if not low carb)] over the top and brown with a culinary torch. Pay particular attention to the black berries to make them look like they baked. 


**** I swapped out the low carb crust recipe I originally posted because of it's tendency to soak. The Basic Low Carb Pie Crust resists soaking better. 
Nutritional information for the custard only: Calories: 155g, Fat: 12g, Carbs: 5g, Fiber: 1g, Protein 6g, NET CARBS: 4
Nutrition Facts
Blackberry Custard Pie - Easy Buttermilk Pie Recipe (Sugar-free, Low Carb)
Amount Per Serving
Calories 355 Calories from Fat 252
% Daily Value*
Fat 28g43%
Carbohydrates 10g3%
Fiber 4g17%
Protein 16g32%
* Percent Daily Values are based on a 2000 calorie diet.


Calories: 355kcal | Carbohydrates: 10g | Protein: 16g | Fat: 28g | Fiber: 4g