Yogurt Coffeecake - cooking recipe

Ingredients

1/2 c. softened margarine
1 c. packed light brown sugar
1 egg yolk
1 tsp. vanilla
2 c. flour
1 tsp. baking soda
1/2 tsp. baking powder
1/4 tsp. salt
1 c. fruit flavored yogurt
confectioners sugar

Preparation

In mixer, cream butter and brown sugar.
Add egg yolk and vanilla; beat until fluffy.
Stir together flour, soda, baking powder and salt.
Add to creamed mixture alternately with yogurt. Blend well.