3/4 cup sugar
1/4 cup margarine
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
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.
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.