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5 from 1 vote

Sourdough Discard Banana Snack Cake

With an intense banana and a rich peanut butter flavor, this Sourdough Discard Banana Snack Cake will be your new favorite way to use up overripe bananas and excess discard.  
Prep Time30 minutes
Cook Time50 minutes
Total Time1 hour 20 minutes
Course: Dessert
Cuisine: American
Servings: 16 slices
Calories: 196kcal

Ingredients

  • 156 grams all-purpose flour
  • 6 grams salt
  • 3 grams baking soda
  • 56 grams unsalted butter softened
  • 75 g peanut butter
  • 250 g granulated sugar
  • 2 eggs
  • 56 g sourdough discard
  • 7 g vanilla or rum
  • 28 grams milk
  • 227 grams overripe bananas mashed
  • 60 grams chocolate chunks

Instructions

  • Preheat your oven to 350 F (176 C). Line an 8-inch baking pan with parchment paper. 
  • Whisk together flour, salt and baking soda and set aside. 
    156 grams all-purpose flour, 6 grams salt, 3 grams baking soda
  • Using a stand mixer or hand mixer, cream together the peanut butter, butter and sugar until the mixture appears light and fluffy.
    56 grams unsalted butter, 75 g peanut butter, 250 g granulated sugar
  • Add eggs one at a time until each is fully combined. 
    2 eggs
  • Add bananas, sourdough discard and vanilla until well-incorporated. 
    56 g sourdough discard, 227 grams overripe bananas, 7 g vanilla or rum
  • Fold in half of the flour mixture with a spatula until the flour is hydrated. Add milk and the remaining flour until fully incorporated but do not overmix or your cake may turn out rubbery. 
    28 grams milk
  • Pour batter into your prepared baking pan and sprinkle chocolate chunks on top.
    60 grams chocolate chunks
  • Bake cake for 40 to 50 minutes or until a toothpick inserted into the center comes out clean. 

Notes

When in doubt, use weight over volume measures. 

Nutrition

Calories: 196kcal | Carbohydrates: 30g | Protein: 3g | Fat: 7g | Saturated Fat: 3g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 3g | Trans Fat: 0.1g | Cholesterol: 28mg | Sodium: 227mg | Potassium: 121mg | Fiber: 1g | Sugar: 19g | Vitamin A: 131IU | Vitamin C: 1mg | Calcium: 13mg | Iron: 1mg