Step 1

Preheat oven to 350°F. Coat a 9×13 baking dish with baking spray, set aside

Step 2

In a medium bowl whisk together flour, baking powder and salt. Set aside.

Step 3

In a large bowl stir together the mashed bananas, butter, sugar, eggs and vanilla until mixed well.

Step 4

Add in the flour mixture and milk in alternating portions and stir until combined. Set batter aside while you make your crumb mixture.

Step 5

In a large bowl combine the cold, cubed butter, light brown sugar, and flour using a fork or pastry cutter until a coarse crumb forms.

Step 6

Pour 1/2 of the batter into the prepared pan. Top with 1/3 of the crumb mixture. Cover the filling with the remaining batter and then top with remaining crumb mixture.

Step 7

Bake for 50-55 minutes until the center is set and a toothpick comes out clean.

Step 8

If desired mix powdered sugar and milk together and drizzle on top of slightly cooled cake.

Step 9

Can be served warm or at room temperature.