Chocolate Streusel Coffee Cake

Preheat oven to 350 degrees F. Spray a 9 x 9-inch pan with nonstick cooking spray.

In a medium bowl, cream margarine and sugar, then beat in egg. Sift together flour, baking powder and salt in a separate bowl. Add to creamed mixture alternately with milk. Stir in vanilla. Pour half of the batter into prepared pan.

For Topping: In a small bowl, mix together sugar, flour, cocoa and cinnamon. Cut in butter with pastry blender or fork, or use fingers to work in until it resembles wet sand, with some larger crumbs. Add in chips.

Spoon half over batter and top with remaining batter. Spoon remaining topping over batter.

Bake at 350 degrees F for 30 minutes.