Banana Split Cake

1. In a medium size bowl, combine the ingredients for the streusel. Set aside.
2. Preheat oven to 350 F. In a large bowl, sift together the flour, baking soda, baking powder, salt and cocoa powder. Set aside.
3. In the bowl of a large stand mixer, cream together the butter and sugar. Add the egg and mix until combined. Scrape down the sides of the bowl. Add the bananas and milk. Mix well.
4. Slowly add the dry ingredients into the wet, incorporating slowly.
5. Prepare a 9×9 inch metal baking pan. You can either spray with cooking spray or smear with butter. (I used butter.)
6. Pour half of the batter into the pan. Top with half of the streusel mixture. Repeat layers once more.
7. Bake in the preheated oven for 45 minutes. Remove from oven and set pan on a rack.
8. Allow to cool for 5 minutes before cutting.