Stir in melted butter, slowly. Pour into greased 9x13 pan.
Mix topping ingredients (1 cup butter softened, brown sugar, flour and cinnamon). Drop over cake mixture evenly.
Swirl your topping and cake mixture with a knife going up and down the length of the pan.
Bake at 350 for 28-32 minutes. Top with the glaze which is made by mixing 2 cups powdered sugar, 5 TB milk and 1 tsp. vanilla. Drizzle over the cake while it's still warm. ENJOY!