3/4 cup sugar
1/4 cup margarine
2 eggs
1/2 teaspoon vanilla
1-3/4 cups flour
1 teaspoon each baking soda and baking powder
1/2 teaspoon ground cinnamon
1/4 teaspoon salt
2/3 cup buttermilk or sour milk*
2 cups halved Washington Italian prunes or plums
Streusel Topping
Ground cinnamon to sprinkle

Cream sugar and margarine until fluffy.  Add eggs and vanilla; mix well.  Combine flour, baking soda, baking powder, cinnamon and salt.  Add dry ingredients and milk alternately to creamed mixture.  Mix well.  Pour into a greased and floured 13 x 9 x 2-inch pan.  Arrange fruit cut-side up on dough; sprinkle with Streusel Topping and some cinnamon.  Bake at 350°F 25 to 30 minutes or until wooden pick inserted near center comes out clean. 

Makes 12 servings.
 
Streusel Topping:  Combine 1/3 cup flour, 1/4 cup sugar and 1/4 teaspoon lemon extract; using a fork.  Cut in 2 tablespoons margarine until crumbly.
 
*To make sour milk:  Add 1/2 teaspoon vinegar to 2/3  cup plain milk; let stand 5 minutes.