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Keto Rhubarb Sour Cream Coffee Cake Recipe

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A soft, sweet, and lightly tangy coffee cake made for the keto diet. This low-carb rhubarb sour cream cake is full of flavor, easy to make, and perfect for breakfast or an afternoon treat. No sugar, no gluten—just rich, buttery cake with a bright rhubarb twist.

Ingredients

Scale

Dry:

  • 1½ cups almond flour

  • ¼ cup coconut flour

  • ½ cup erythritol (or other keto sweetener)

  • 1 tsp baking powder

  • ½ tsp baking soda

  • ¼ tsp salt

Wet:

  • 3 large eggs, room temperature

  • ½ cup sour cream

  • ⅓ cup melted butter

  • 1 tsp vanilla extract

Rhubarb Layer:

  • 1 cup chopped rhubarb (fresh or frozen, thawed and dried)

  • 2 tbsp erythritol

  • 1 tsp lemon juice

Optional Topping:

  • ¼ cup almond flour

  • 2 tbsp erythritol

  • ½ tsp cinnamon

  • 2 tbsp melted butter

Instructions

  1. Preheat oven to 350°F and grease or line an 8×8 inch pan.

  2. Cook chopped rhubarb with 2 tbsp erythritol and lemon juice in a pan over medium heat until soft (5–7 minutes). Let cool.

  3. In a large bowl, mix almond flour, coconut flour, baking powder, baking soda, erythritol, and salt.

  4. In another bowl, whisk eggs, then add sour cream, melted butter, and vanilla.

  5. Stir wet mix into dry until smooth. Batter will be thick.

  6. Spread half the batter into pan, then layer rhubarb on top. Dollop remaining batter over rhubarb.

  7. For topping, mix almond flour, cinnamon, erythritol, and butter. Sprinkle over cake.

  8. Bake for 30–40 minutes until golden and toothpick comes out mostly clean.

  9. Cool for 15 minutes before slicing. Store covered in fridge.

Notes

  • Use Greek yogurt if you don’t have sour cream.

  • Swap erythritol with monk fruit or allulose if preferred.

  • Let it rest before cutting—it holds together better.

  • Keeps in fridge for 4–5 days or freeze for later.

Please note: The recipe or ingredients shown in the video might vary slightly from what’s listed here. Use the video as an illustration, but for the best results, you might want to stick to the recipe provided in this article.

Nutrition

Find it online: https://www.wellnesswarrior.org/keto-rhubarb-sour-cream-coffee-cake/