Blueberry Coffee Cake - cooking recipe

Ingredients

1/4 c. margarine, softened
3/4 c. sugar
1 egg
2 c. all-purpose flour
2 tsp. baking powder
1/2 tsp. salt
1/2 c. milk
2 c. blueberries
1 recipe streusel mix

Preparation

Cream butter in a large mixing bowl.
Gradually add sugar, beating well.
Add egg and beat well.