# List of Ingredients:
→ 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 for garnish (optional)
# Step-by-Step Directions:
01 - Preheat oven to 350°F. Grease a 9x13-inch baking dish and set aside.
02 - In a mixing bowl, combine the white cake mix with 1 cup water, 1/2 cup vegetable oil and 3 large eggs; beat with an electric mixer or whisk until smooth and uniform.
03 - Pour batter into the prepared 9x13-inch pan and bake 28–32 minutes, or until a toothpick inserted in the center comes out clean.
04 - Remove the pan from the oven and allow the cake to cool for 15 minutes. Using the handle of a wooden spoon or similar tool, poke holes evenly across the surface about 1 inch apart.
05 - In separate heatproof bowls, dissolve the red gelatin in 1 cup boiling water and the blue gelatin in 1 cup boiling water; once dissolved, stir 1/2 cup cold water into each bowl.
06 - Carefully spoon or pour the red gelatin into roughly half of the holes and the blue gelatin into the remaining holes so the colors distribute across the cake.
07 - Refrigerate the cake for at least 2 hours, or until the gelatin is fully set.
08 - Spread the thawed whipped topping evenly over the chilled cake, then sprinkle with the red, white, and blue sprinkles. Arrange fresh strawberries and blueberries across the top if using.
09 - Slice into 12 portions and serve chilled.