Banana Bread Crumb Cake

Preheat oven to 350 degrees. Spray a 9x13 baking dish with cooking spray, set aside. In a medium bowl, whisk together 2 cups flour, baking powder and salt. Set aside. In a large bowl, mash bananas until they become liquified. Mix in 1/2 cup room temperature butter until combined and then stir in sugar, eggs, and vanilla until mixed well. Stir in 1 cup milk and flour mixture until combined. Pour 1/2 of the batter into the prepared pan. Prepare crumb filling/topping by combining cold butter, brown sugar and 2 cups flour, cutting them together with a fork or pastry cutter until a coarse crumb forms. Top batter in pan with 1/3 of the crumb mixture. Cover the filling with the remaining batter and top with remaining crumb mixture. Bake for 50-55 minutes until the center is set and a toothpick comes out clean. Cool for 10 minutes. If desired, mix powdered sugar and 1-2 Tbsp. milk together and drizzle on top. Can be served warm or at room temperature. Store airtight for up to 2 days.