Step 1

Preheat the oven to 350º F.

Step 2

Spray a 9x13 inch pan with non-stick cooking spray. Add 2 cups of blueberries to the bottom of the pan. Sprinkle the sugar and the lemon zest over the blueberries.

Step 3

Sprinkle the dry cake mix evenly over the blueberries.

Step 4

Drizzle the melted butter evenly over the dry cake. Add 1 cup of blueberries on top of the cake.

Step 5

Bake for 45-48 minutes or until golden yellow.

Step 6

Allow the cake to sit for 10 minutes before serving. Serve warm or cold with ice cream if desired!