This is a recipe I've been meaning to try. Though, I will probably double the Streusel. (I do the same thing with cake frosting recipes.)
Fruit Yogurt Coffee Cake
recipe from old Bisquick advertising
2 cups Bisquick baking mix
1/4 cup sugar
2 tbsp. butter or margarine, softened
3/4 cup fruit-flavored yogurt (about 8 oz.)
1 tsp. vanilla
Heat oven to 375˚. Grease square pan, 8 x 8 x 2 inches. Mix all ingredients except Streusel; beat vigorously 1 minute. Spread into pan; sprinkle with Streusel. Bake until wooden toothpick inserted in center comes out clean, 30 to 35 minutes. Cool 10 min.; cut into squares. Makes 9 servings.
Streusel: Mix 1/4 cup Biquick, 1/4 cup sugar and 2 tbsp. firm butter or margarine until crumbly. Stir in 1 tbsp. grated lemon or orange peel, if desired.
High altitude directions (3500 to 6500 feet): heat oven to 400˚. Decrease baking mix to 1 1/2 cups; add 1/2 cup all-purpose flour.