Ingredients

• 1 , 15.25 ounce
• 1 cup water
• 3 eggs
• 0.5 cups vegetable oil
• 4 cups fresh blueberries
• 1 cup white sugar
• 1 , 3 ounce
• 3 cups miniature marshmallows
• 2 cups frozen whipped topping , such as Cool Whip

Instructions

1. 1 Preheat the oven to 350 degrees F (175 degrees C). Grease a 9x13-inch baking pan.
2. 2 Combine cake mix, water, eggs, and vegetable oil in a large bowl; beat with an electric mixer on low speed until moistened. Increase speed to medium and beat until smooth, about 2 minutes.
3. 3 Spread blueberries in the bottom of the prepared baking pan. Layer sugar, gelatin powder, and marshmallows on top. Pour cake batter evenly over marshmallows; smooth the top.
4. 4 Bake in the preheated oven until a toothpick inserted into the center comes out clean, 50 to 55 minutes. Transfer baking pan to a wire rack; let cake cool in pan, about 30 minutes.
5. 5 Spread whipped topping over the cooled cake and serve.

Nutrition per serving