In large mixer bowl, combine cake mix and softened butter until ... greased and floured 9x13 inch pan. Spoon drained blueberries ... center comes out clean.
Heat oven to 400 degrees. Prepare 1 package of wild blueberry muffin mix as directed except ... Do ahead note: Coffee cake may be prepared day before ... butter and lemon juice.
Ingredients: 6 (cornstarch .. juice .. peel .. sugar ...)
Heat oven to 375 degrees. ... drizzle frosting over cake. Let cool before cutting. ... on top of blueberry batter. Mix until crumbly. Sprinkle ... over warm baked cake.