c("Heat oven to 400 degrees.", "Mix 2 cups baking mix, 1/2 cup sugar, 1/2 cup butter  and egg yolks until crumbly.", "Press into ungreased rectangular pan, 13x9x2\".", "Bake 10 min.", "Beat egg whites until stiff; fold in blueberries.", "Spread over baked  layer.", "Mix remaining ingredients until crumbly; sprinkle over blueberry mixture. Bake until golden brown, about 20 min.")