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Slice of Banana Bread Crumb Cake with a drizzle of icing.
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5 from 4 votes

Banana Bread Crumb Cake

Tender and soft this banana cake is loaded up with flavor and a hint of spice. Topped with a sweet, brown sugar crumb this is the perfect snack or breakfast cake!
Prep Time5 minutes
Cook Time45 minutes
Course: Breakfast
Cuisine: American
Servings: 12
Author: Serene


Banana Cake

  • ½ cup unsalted butter room temperature
  • ½ cup white sugar
  • ½ cup light brown sugar
  • 2 large eggs
  • 1 teaspoon vanilla extract
  • 3 ripe bananas mashed
  • 2 cups all purpose flour
  • ½ teaspoon baking powder
  • ½ teaspoon baking soda
  • ½ teaspoon salt
  • ½ teaspoon ground cinnamon
  • cup buttermilk*

Crumb Topping

  • ½ cup light brown sugar
  • ½ cup all purpose flour
  • ½ teaspoon ground cinnamon
  • 3 tablespoons butter melted


  • Preheat oven to 350℉. Line a square baking pan with parchment paper or spray with non stick baking spray.
  • In a small mixing bowl prepare the crumb by mixing together the light brown sugar, flour and cinnamon. Stir to combine. Drizzle with the melted butter, then use a fork mix until large crumbs are formed. Set aside.
  • In a large mixing bowl add the room temperature butter, white and light brown sugars. Cream together. Add in the eggs and vanilla extract. Stir to combine.
  • Mash the bananas with a fork, then add to the batter, stir to combine, will be slightly lumpy.
  • In a medium size mixing bowl combine the dry ingredients: flour, baking powder, baking soda, salt, ground cinnamon, stir with a fork to mix.
  • Add the dry ingredients to the wet ingredients, stir slowly and pour in the buttermilk while stirring. Stir until just combined.
  • Pour the batter into the prepared baking pan and sprinkle the crumbs on top. Gently press the crumbs into the batter to help stick.
  • If using an 8x8 pan bake for about 45-50 minutes. If using a 9x9 pan bake for about 35-40 minutes.
  • Allow to cool for about 30 minutes prior to serving. If desired top with icing.


  1. If you don't have buttermilk on hand you can make sour milk. Add 2 teaspoons of lemon juice or plain white vinegar to your measuring cup, then pour the milk in to reach ⅔ cup. Let it sit briefly. This will make sour milk.
  2. If you want to make this in a 9x13 pan you can add an additional ½ cup flour and ⅓ cup milk to the recipe. Double the crumb recipe and bake for 40 minutes.
  3. Simple icing recipe: 1 cup powdered sugar, 2-3 tablespoons milk, 1/2 teaspoon vanilla. Mix together, add more powdered sugar or more milk to get the desired consistency.


Serving: 1slice | Calories: 337kcal | Carbohydrates: 54g | Protein: 4g | Fat: 12g | Sodium: 244mg