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Slice of banana cake with whole wheat peanut butter frosting on a ceramic plate

Banana Cake with Whole Wheat Peanut Butter Frosting

Banana cake with whole wheat peanut butter frosting is a tender, lightly sweet dessert with a soft crumb and creamy topping. It is a simple homemade cake that brings together comforting banana flavor and rich peanut butter appeal.
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Prep Time 15 minutes
Cook Time 25 minutes
Total Time 40 minutes
Servings: 9 servings
Course: Dessert
Cuisine: American
Calories: 318
Ingredients Method Notes

Ingredients
  

Dry ingredients
  • 1 1/2 cups whole wheat pastry flour
  • 1 teaspoon baking powder
  • 1 teaspoon baking soda
  • pinch of salt
Wet ingredients
  • 1/4 cup sugar
  • 1/2 cup maple syrup
  • 1/2 cup banana puree
  • 1/2 cup oil
  • 1/4 cup water
  • 1 beaten egg (sub 4 teaspoons flax for vegan)
Frosting
  • 1/4 cup natural peanut butter
  • 1/4 cup water
  • 2 tablespoons sugar

Method
 

Preparation
  1. Preheat the oven to 350°F / 175°C.
  2. Sift the whole wheat pastry flour, baking powder, baking soda, salt, and flax if using into a large bowl.
  3. In a separate smaller bowl, mix the sugar, maple syrup, banana puree, oil, water, and beaten egg.
  4. Pour the wet mixture into the dry ingredients and stir until combined. Transfer the batter to a greased 9×9 baking dish.
Baking
  1. Bake for 20-24 minutes, or until a knife inserted into the center comes out mostly clean.
Frosting
  1. Whisk the peanut butter, sugar, and water together until smooth and fluffy.
  2. Adjust the consistency with additional peanut butter or water as needed, then spread the frosting over the cooled cake before serving.

Notes

This cake is best enjoyed the same day it is baked. It also works well without the frosting for a lighter version. The frosting amount can be increased with more peanut butter and water for a richer topping, as reflected in the nutrition facts.