Sensational Cinnamon Coffee Cake

1/4 c. margarine
3/4 c. sugar
1 egg, slightly beaten
1 1/2 c. flour
2 tsp. baking powder
1/2 tsp. salt
1 c. milk
1 tsp. vanilla extract

Topping:
1 c. brown sugar
2 tbsp. flour
2 tsp. cinnamon
4 tbsp. margarine
1/2 c. walnuts or pecans, finely chopped

Preheat oven to 350°F. Spray a 9x9-inch pan with nonstick cooking spray. In a medium bowl, cream margarine and sugar; 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 blended mixture into prepared pan.

To make topping, in a small bowl, mix together sugar, flour, and cinnamon. Cut in margarine with pastry blender or fork. Spoon half over batter and swirl. Spoon remaining topping over batter and sprinkle with nuts.

Bake for 30 minutes.