1 1/3 cups Original Bisquick mix
1 1/3 cups brown sugar
2 tsp cinnamon
1/2 cup firm butter, cut into pieces
4 cups Original Bisquick mix
1 1/3 cups milk or water (I always use milk)
4 tbsp sugar
Grease a 9 x 13" pan. In a bowl, combine the streusel ingredients and stir together until crumbly, set aside.
In another bowl, combine the cake ingredients, stirring just until blended. Spread into the greased pan. Sprinkle with the streusel. Bake 375 degrees for 18 - 22 minutes or until set and golden brown.