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side view of a slice of crumb cake on a white plate
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5 from 1 vote

Banana Bread Peanut Butter Crumb Cake

Banana bread transforms into the most delicious crumb cake with the addition of a soft and sweet peanut butter crumb topping.
Prep Time20 minutes
Cook Time1 hour
Total Time1 hour 20 minutes
Course: Breakfast
Cuisine: American
Servings: 9
Calories: 541kcal

Equipment

  • 8x8 metal pan

Ingredients

Peanut Butter Crumb Topping

  • cup granulated sugar
  • cup light brown sugar
  • teaspoon salt
  • 5 Tablespoons unsalted butter
  • ¼ cup peanut butter
  • 1 ¼ cups all-purpose flour

Banana Bread Cake

  • ½ cup unsalted butter
  • 3 large bananas, overripe
  • 1 cup granulated sugar
  • 2 cups all-purpose flour
  • 1 teaspoon baking powder
  • ½ teaspoon baking soda
  • 1 large egg

Instructions

Make the crumb topping.

  • In a medium bowl, whisk the sugars and salt together.
  • Melt the butter in a small bowl in the microwave. Stir the peanut butter into the melted butter until the peanut butter melts into the butter.
  • Stir the peanut butter mixture into the sugar mixture. Add the flour and stir until a crumbly dough forms. Set aside.

Make the banana bread cake.

  • Preheat the oven to 325°F. Place the butter in an 8 inch x 8 inch baking pan and set it in the oven to melt.
  • In a large bowl, mash bananas using a potato masher or the backside of two forks. Add sugar and stir to combine. Add flour, baking powder, and baking soda and stir to combine. Add egg and stir to combine.
  • Remove the pan with the butter from the oven. Carefully tilt the pan to coat the sides with the melted butter, then pour the melted butter into the bowl with the banana mixture and stir to combine.
  • Pour the banana mixture into the pan and top with the crumb mixture. Gently press the crumbs down into the dough.

Bake the cake.

  • Bake the cake for one hour, until a stick inserted into the center of the cake comes out clean. Let the cake cool in the pan.
  • Once it's cool (or nearly cool), dust the cake with powdered sugar and slice into 9 squares to serve.

Notes

Storage: Store in an airtight container at room temperature for up to 4 days.

Nutrition

Calories: 541kcal | Carbohydrates: 83g | Protein: 8g | Fat: 21g | Saturated Fat: 11g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 6g | Trans Fat: 1g | Cholesterol: 62mg | Sodium: 184mg | Potassium: 253mg | Fiber: 3g | Sugar: 43g | Vitamin A: 561IU | Vitamin C: 3mg | Calcium: 53mg | Iron: 3mg