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Sprinkle Marshmallow Cake Bars

Need a quick and easy celebration dessert idea? Look no further than these sprinkle marshmallow cake bars!

These couldn’t be easier to make. They use a boxed cake mix as the base, and are then topped with melted marshmallows, chocolate chips, and sprinkles for the perfect party food!

Sprinkle marshmallow cake squares on a plate with small bowls of sprinkles, chocolate chips and marshmallows beside it.

Party Dessert In-A-Pinch

Sometimes we just need a quick and easy party dessert idea. This one a no-fuss recipe that will delight guests, especially kids!

  • By using a boxed cake mix you’re saving time and effort.
  • This is such a simple an easy idea that looks like it took a lot more work than it actually did.
  • Prep is less than 5 minutes, then after baking and chilling, all you need to do is slice and serve.
  • Boxed cake mix is inexpensive, making this an affordable recipe to serve at parties. For even more savings, buy other ingredients like marshmallows, sprinkles and chocolate chips from the bulk food section at the grocery store.
  • This recipe can easily be adapted to your tastes. Feel free to use a different flavor of cake mix and toppings!
Recipe ingredients on the counter including a boxed chocolate cake mix, bowl of melted butter, bowl of chocolate chips, milk, mini marshmallows, sprinkles and eggs.

Recipe Ingredients

CAKE MIX BOX: To keep things easy, this recipe uses a boxed cake mix. You can use any style of cake mix, I used Betty Crocker’s devil’s food cake mix. White, chocolate, strawberry or any other flavors will all work. And depending on the brand and cake mix you use, the ingredient additions (eggs, milk, butter) might vary.

CAKE ADDITIONS: For this recipe, I used milk, melted butter, and eggs to make the cake. You can follow the instructions on the back of your cake mix box to make the cake as this will give the best results.

TOPPINGS: The toppings are the star of the show here! Mini marshmallows, chocolate chips and confetti sprinkles are added to the top of the cake to give the perfect celebratory effect. Feel free to switch up the toppings. Chopped nuts, crushed pretzels, and M&Ms would all be great additions.

Four images showing steps to make recipe. First is bowl with chocolate cake batter and spatula. Second is cake batter in a rectangular baking dish. Third is Cake topped with marshmallows, chocolate, and sprinkles. Fourth is sliced finished dessert in dish with a knife beside it.

How To Make Sprinkle Marshmallow Cake Bars

This recipe is easy peasy and the perfect dump-and-go style dessert:

  1. Add cake mix and other ingredients according to the boxed cake mix instructions.
  2. Bake the cake until set.
  3. Sprinkle the top with chocolate chips, marshmallows, and sprinkles according to the full recipe instructions below.
  4. Place back in the oven until marshmallows and begin to melt for about 2-3 minutes.
  5. Let cool, then place in the fridge to chill completely. Slice into squares to serve.
Three cake bars stacked on top of eachother, topped with melted marshmallows, chocolate chips and sprinkles.

Recipe Tips

  • Follow the boxed cake mix instructions for the best results. Each cake box will vary in ingredients and cooking times.
  • Once you add the toppings, keep an eye on them in the oven. As soon as they begin to melt you can remove the cake. Keeping it in the oven too long can result in an overbaked cake.
  • Feel free to change up the toppings! Chopped nuts, crushed pretzels, candies, gummy worms, and M&Ms are all fun additions that kids will love. (Add the gummies after the cake is out of the oven so that they won’t melt).
  • The cake needs to be chilled completely before slicing, otherwise, the chocolate chips won’t keep their shape.
  • Slice the bars in advance before serving for an easy grab-and-eat style dessert.
Marshmallow sprinkle cake slices on a serving dish with small bowls of chocolate chips, forks and plates beside it.

More Easy Desserts

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Marshmallow Sprinkle Cake Bars

These couldn’t be easier to make. They use a boxed cake mix as the base, and topped with melted marshmallows, chocolate chips, and sprinkles for the perfect party food!
Print Pin Recipe
Prep Time: 10 minutes
Cook Time: 30 minutes
Total Time: 40 minutes
Servings: 12 servings

Ingredients

Instructions

  • Preheat the oven to 350°F. Spray a small casserole dish with nonstick cooking spray (will also work in square or circle baking dish).
    White rectangular baking dish and cooking spray on a counter.
  • Add cake box contents to a large bowl along with egg, milk, and melted butter (or follow boxed cake mix ingredients and instructions). Mix together.
    Two images of a large white bowl. First is dry cake mix, eggs, milk and melted butter in a bowl. Second is chocolate cake batter in a bowl with a spatula.
  • Pour batter into prepared baking dish. Bake for 25-30 minutes, or until cake is almost fully set.
    Two images of a white baking dish with handles: First is chocolate cake batter in a baking dish. Second is baked chocolate cake in the baking dish.
  • Remove from oven, then add marshmallows, chocolate chips and sprinkles on top. Place back in the oven for 1-3 minutes to melt.
    Remove and let cool completely. Then place in the fridge to chill for 1-2 hours. Marshmallows and chocolate chips will need to harden and before slicing.
    Two images of a white baking dish with handles: first is unmelted chocolate, marshmallows and sprinkles on top. Second is melted ingredients after heating in oven.
  • Once cooled, slice into squares. Serve and enjoy!
    Sliced dessert with melted marshmallows and chocolate on top. A small knife is beside the baking dish.

Recipe Notes:

  • Leftovers can be stored in an airtight container in the fridge up to 4-5 days.
  • Follow the boxed cake mix instructions for the best results. Each cake box will vary in ingredients and cooking times.
  • Once you add the toppings, keep an eye on them in the oven. As soon as they begin to melt you can remove the cake. Keeping it in the oven too long can result in an overbaked cake.
  • Feel free to change up the toppings! Chopped nuts, crushed pretzels, candies, gummy worms, and M&Ms are all fun additions that kids will love. (Add the gummies after the cake is out of the oven so that they won’t melt).
  • The cake needs to be chilled completely before slicing, otherwise, the chocolate chips won’t keep their shape.
  • Slice the bars in advance before serving for an easy grab-and-eat style dessert.
Nutrition
Calories: 293kcal | Carbohydrates: 42g | Protein: 4g | Fat: 14g | Saturated Fat: 6g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 4g | Trans Fat: 1g | Cholesterol: 43mg | Sodium: 326mg | Potassium: 161mg | Fiber: 1g | Sugar: 27g | Vitamin A: 192IU | Calcium: 85mg | Iron: 2mg

Please note these nutritional values provided above are just an estimate. Actual numbers will vary based on brands and ingredients you choose, and your preferred portion sizes.

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