Step 1

Preheat the oven to 350 degrees. Grease a 9 x 13 inch pan. In a small bowl, whisk together the flour, baking powder, and salt. In another large bowl, mash the bananas. Beat in the butter until well combined. The butter will likely not incorporate all the way and might look separated. This is just fine! Add the sugar, eggs, and vanilla and beat until combined.

Step 2

Stir in the flour and milk alternately, beginning and ending with the milk. Set aside.

Step 3

In another bowl, combine all of the crumb ingredients and use a pastry cutter or forks to cut in the butter until pea sized crumbs form.

Step 4

Pour half of the cake batter into the prepared pan then layer with half of the crumbs. Pour the remaining batter on top followed by the rest of the crumbs. Bake in the preheated oven for 45-55 minutes or until a toothpick inserted in the center comes out clean.

Step 5

Remove from oven and allow to cool for 10 minutes. Whisk together the glaze ingredients in a measuring cup then drizzle over the cake. Serve warm or at room temperature. Cake will keep for 3 days in a covered container, but the crumbs will lose their crunch after the first day.