Butterfinger Coffeecake

1/4 c. margarine, softened
2 c. flour
1/2 c. sugar
1 c. brown sugar, packed
1 c. buttermilk (can use the instant mix also)
1 egg
1 tsp. Baking Soda
1 tsp. Vanilla Extract
6 Butterfinger Candy bars
1/2 cup chopped nuts, optional

In a large bowl, cream margarine, flour, & sugars. Reserve half of cup for later. Beat in buttermilk, egg, baking soda, and vanilla; mix well. Pour batter into a greased 9x13 pan. Crush candy bars with the reserved crumbly mixture and optional nuts. Sprinkle mixture over batter and bake in a preheated oven at 350* for 30 minutes or until a toothpick inserted in center comes out clean. Serves 12