Blueberry Coffee Cake
["1 pkg. lemon cake mix", "1/2 c. softened butter", "2/3 c. milk", "2 eggs", "16 oz. blueberries"]
["Heat oven to 350\u00b0 and grease a 9 x 13 pan.", "Combine cake mix and butter until crumbly.", "Reserve 1 1/4 cups crumbs for topping. To remaining crumbs, add milk and eggs; beat 2 minutes on high. Pour into prepared pan.", "Spread berries on top.", "Sprinkle with crumbs.", "Bake at 350\u00b0 for 35 to 45 minutes."]
["lemon cake mix", "butter", "milk", "eggs", "blueberries"]