# Ingredient List:
→ Cake
01 - 1 box (15.25 oz) white cake mix
02 - 1 cup water
03 - 1/2 cup vegetable oil
04 - 3 large eggs
→ Gelatin
05 - 1 box (3 oz) strawberry or cherry-flavored gelatin
06 - 1 box (3 oz) berry blue gelatin
07 - 2 cups boiling water, divided
08 - 2 cups cold water, divided
→ Topping
09 - 1 tub (8 oz) frozen whipped topping, thawed
10 - 2 tablespoons red, white, and blue sprinkles or nonpareils
11 - Fresh strawberries and blueberries, optional, to garnish
# Steps:
01 - Preheat the oven to 350°F. Grease a 9x13-inch baking dish with butter or nonstick spray and set aside.
02 - Combine the white cake mix, 1 cup water, 1/2 cup vegetable oil and 3 large eggs in a mixing bowl; beat with an electric mixer or whisk until smooth and homogenous according to the package directions.
03 - Transfer the batter to the prepared 9x13-inch dish and bake 28–32 minutes, or until a toothpick inserted into the center comes out clean. Remove from the oven and allow to rest 15 minutes on a wire rack.
04 - Using the handle of a wooden spoon, poke holes about 1 inch apart across the surface of the warm cake to create cavities for the gelatin.
05 - In separate bowls dissolve each 3 oz gelatin in 1 cup boiling water; stir until fully dissolved, then stir in 1/2 cup cold water into each bowl.
06 - Carefully spoon the red gelatin into approximately half of the holes and the blue gelatin into the remaining holes, allowing the liquid to settle into the cavities. Refrigerate the cake at least 2 hours, or until the gelatin is completely set.
07 - Spread the thawed whipped topping evenly over the chilled cake. Scatter sprinkles across the surface and arrange fresh strawberries and blueberries if using. Keep refrigerated; slice and serve chilled.
