1 Preheat oven to 375°F. For the Streusel Topping, mix brown sugar, flour, cinnamon and allspice in large bowl. Cut in butter with pastry blender or 2 knives until mixture resembles coarse crumbs. Set aside.
2 For the Cake, beat butter and granulated sugar in large bowl with electric mixer on medium speed until light and fluffy. Add eggs and vanilla; beat until well mixed. Mix flour and baking powder in medium bowl. Add to butter mixture alternately with milk. Gently stir in blueberries. Pour into greased and floured 11x7-inch baking dish. Sprinkle with Streusel Topping.
3 Bake 30 minutes or until cake pulls away from sides of pan. Cool in pan on wire rack.