Instructions

• Preheat oven to 350º F. Grease a 9" x 13" baking dish with butter or cooking spray; set aside.
• In a large bowl, use your hands or two forks to crumble together the cold butter cubes, flour, sugars, and cinnamon until the mixture resembles a crumbly topping. Set aside the crumb mixture.
• In a large bowl, whisk together flour, baking powder, cinnamon, and salt. Set aside.
• In a stand mixer, mix softened butter on medium until creamy, about 2 minutes. Add the sugar and mix for another minute, until well incorporated. Then add the eggs, vanilla, and mashed bananas, and mix just until ingredients are incorporated (do not overmix!).
• Turn the mixer down to low, and alternate mixing in milk and flour until all ingredients are combined.
• Pour half of the cake mixture into the prepared baking dish. Top with ⅓ - ¼ of the crumb mixture. Then pour the remaining cake mixture on top of that layer and finally, top evenly with the remaining crumb topping.
• Bake at 350º for 50-55 minutes, until a toothpick comes out clean.
• To make the optional glaze: In a small bowl, whisk together the powdered sugar and 1 tablespoon of milk. Add more milk as needed until you get the glaze consistency you prefer. Set aside.
• Cool at room temperature for 5-10 minutes before drizzling the glaze over the top, slicing, and serving.