Go Back
Healthy Sourdough Banana Bread: High-Protein & Low-Carb Baking Guide
Stephanie Moore

High-Protein Sourdough Banana Bread

A gut-friendly, low-carb banana bread powered by sourdough fermentation and protein isolate. Dense, moist, and packed with probiotics and bioavailable nutrients. Perfect for keto, fitness, or sustainable energy.
Print Recipe Pin Recipe
Prep Time 15 minutes
Cook Time 45 minutes
Total Time 4 hours 45 minutes
Servings: 1 servings
Course: Breakfast
Cuisine: American
Calories: 210
Ingredients Method Notes

Ingredients
  

  • 2 overripe bananas
  • 3 eggs
  • 1/2 cup whey protein isolate (vanilla)
  • 1/4 cup almond flour
  • 1/4 cup coconut flour
  • 1/4 cup unsweetened applesauce
  • 1/2 tsp baking soda
  • 1/2 tsp ground cinnamon
  • 1/4 tsp sea salt
  • 1/4 cup erithritol
  • 1 cup active sourdough starter (100% hydration)
  • 2 tbsp water

Method
 

  1. Preheat oven to 350°F (175°C)
  2. Mash bananas in a bowl
  3. Mix in eggs, protein isolate, almond flour, coconut flour, applesauce, baking soda, cinnamon, salt, and erithritol
  4. Incorporate sourdough starter and water until smooth
  5. Let batter ferment at room temp for 4-6 hours
  6. Pour into greased loaf pan and bake 45-55 minutes
  7. Cool 15 minutes before slicing

Notes

Use 100% hydration sourdough starter for optimal rise
For gluten-free, use brown rice or oat flour blends
Store in air-tight container for up to 5 days
Freezes well in slices