Instructions

1 Preheat oven to 350 degrees F (175 degrees C). Grease and flour a 9 inch square pan.

2 In a large bowl, combine flour, sugar, baking powder and salt. Cut in margarine until mixture resembles coarse crumbs. Set aside 3/4 cup of crumb mixture, to be used as a topping for the cake. Mix eggs and milk together and then blend into remaining mixture in bowl.

3 Spread batter into prepared pan. Sprinkle blackberries evenly over the top. Sprinkle reserved crumb mixture over fruit.

4 Pour batter into prepared pan. Bake in the preheated oven for 25 to 30 minutes, or until a toothpick inserted into the center of the cake comes out clean.