1Sift together first five ingredients and put in a large bowl
2Cut in margarine until mixture looks like crumbs.
3In another bowl, mix together eggs, milk, and vanilla.
4Pour over flour mixture and stir until just moistened.
5Spread in a greased 8" x 12" pan; distribute berries on top.
6In a small bowl, combine brown sugar, flour, and butter.
7Mix with a fork until crumbly.
8Add nuts and sprinkle over top of cake. Bake at 350 degrees for 45 minutes. Makes 6 to 8 servings.