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Banana Walnut Crumb Cake! Banana bread fans will love this recipe!

Banana Walnut Crumb Cake

A flavorful crumb cake full of banana walnut flavor!
Course Breakfast
Cuisine American
Keyword banana, breakfast, crumb cake
Prep Time 20 minutes
Cook Time 50 minutes
Total Time 1 hour 10 minutes


For the Crumble

  • 1/2 cup brown sugar
  • 1/2 cup granulated sugar
  • 2 teaspoons cinnamon
  • 1/2 teaspoon salt
  • 3/4 cup unsalted butter melted
  • 2 cups all-purpose flour
  • 1 cup chopped walnuts

For the Cake:

  • 2 cups all-purpose flour
  • 3 teaspoons baking powder
  • 1 teaspoon cinnamon
  • 1 teaspoon salt
  • 4 ripe bananas
  • 1/2 cup unsalted butter room temperature
  • 2 cups granulated sugar
  • 2 eggs
  • 2 teaspoons vanilla extract
  • 1 cup milk

For the Glaze:

  • 1 cup powdered sugar
  • 1 teaspoon vanilla extract
  • 2-3 tablespoons milk or heavy cream


  • Preheat oven to 350 degrees F. Spray a 9x13 baking pan with nonstick spray. 
  • To make the crumble topping, melt butter and set aside to cool for 2-3 minutes.  Stir in brown sugar and granulated sugar. Add flour, salt, and cinnamon and stir to combine. Mix in chopped walnuts, use a rubber spatula or back of fork to crumble the topping together. Set aside.
  • In a mixing bowl, whisk together the flour, baking powder, cinnamon, and salt. In the bowl of an electric mixer, beat butter and sugar together until blended. Add mashed bananas and beat until just combined. Add eggs and vanilla and beat until combined. Stir in the flour and milk alternately, beginning and ending with the milk. Pour half of the cake batter into the baking pan. Sprinkle half of crumb topping. Then pour the remaining batter on top. Finish with the remaining crumble topping. Bake in the preheated oven for 50-60 minutes or until a toothpick inserted in the center comes out clean.
  • TIP: Cover cake with aluminum if top begins browning too much.  Allow to cool before glazing.
  • To make glaze, whisk together powdered sugar with vanilla extract and milk. Add more powdered sugar if you want a thicker glaze or more milk for a runnier glaze. Drizzle on top of cake.