Banana Bread Crumb Cake

We go through a lot of bananas in our house.  I'm talking 4 bunches a week which is usually between 28-32 bananas for the 3 of us.  If banana prices ever go up we are in big trouble.  Anyways, i had been eyeing this recipe for a while and finally we had some bananas get riper than any of us enjoy so I decided to make this recipe.  The recipe is from Cookies and Cups.

Cake Batter:
2 cups flour
3 tsp baking powder
1 tsp salt
3 ripe bananas (mashed)
1/2 cup butter  (room temperature)
2 cups granulated sugar
2 eggs
1 tsp vanilla
1 cup milk

Crumb Mixture:
1 cup cold butter (cubed)
2 cups light brown sugar
2 cups flour

Heat oven to 350.  Grease a 9x13 pan. In a medium bowl mix together the flour, baking powder and salt.  In a separate bowl combine the mashed banana and banana.  Add in the sugar, eggs and vanilla.  Alternate adding in the milk and flour mixture until it is all combined.  Set to the side.  In a small bowl mix together the light brown sugar and flour.  Cut in the butter with a fork or pastry cutter until it's a coarse crumbly mixture.  Pour half of the batter into the pan then top with 1/3 of the crumb mixture.  Pour the remaining into the pan then top with the rest of the crumb mixture.  Bake for 50 to 55 minutes or until the cake is cooked through.  Let cool for at least 15 minutes before cutting or serve at room temperature.