Preparation Steps

• For the cakes, beat softened butter with granulated sugar for 3 minutes. Add eggs and vanilla extract, beat until combined. Add mashed bananas and beat until blended. In a separate bowl, whisk together flour, baking soda, baking powder, and salt. Gradually add dry ingredients to wet ingredients, mixing until just combined. Beat in the milk and chopped walnuts.
• Pour batter evenly into two greased 9-inch round cake pans.
• In a small bowl, combine streusel topping ingredients: flour, granulated sugar, brown sugar, cinnamon, softened butter, and chopped walnuts. Mix with your fingers or a fork until crumbly. Sprinkle the streusel topping evenly over the batter in both pans.
• Bake at 350 degrees F (175 degrees C) for 25 minutes, or until a wooden skewer inserted into the center comes out clean. Let the cakes cool in the pans on a wire rack for 10 minutes, then invert them onto the wire rack to cool completely.
• For the glaze, whisk together powdered sugar and maple syrup until smooth and drizzly. Drizzle the glaze over the cooled cakes.
• Store cakes in an airtight container at room temperature.