From Lynne Wilson
1½ cups flour
½ cup sugar
2½ tsp. baking powder
½ tsp. salt
4 Tbsp. butter or margarine, softened
1 egg, slightly beaten
½ tsp. vanilla
½ cup milk
1 cup blueberries
1 to 1½ Tbsp. cinnamon sugar
Sift the flour, sugar, baking powder, and salt together into a large mixing bowl. Add the butter, egg, vanilla, and milk and cut in with a pastry blender or two knives only until the ingredients are blended, not smooth. Carefully stir in the blueberries. Spoon into the prepared pan. Sprinkle with the cinnamon sugar and bake at 400°F for about 20 minutes.