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These Halloween Rice Krispie Treats are a simple way to celebrate Halloween! Load them up with festive sprinkles or add in some of your favorite candies.

Plated halloween rice krispie treats next to a glass of milk

I’m all about simple but festive treats – especially if they’re easy enough for my kiddo to help with.

Krispie treats are some of our favorite snacks around here, and not just because they’re so easy to make. 

Everyone loves them, and you can change them up to match the holidays or whatever mood you’re feeling, just like my Halloween popcorn balls.

These easy Halloween treats have pockets of fluffy marshmallow and fluffy frosting, making them even better.

Ingredients for Halloween rice krispie treats arranged on a marble counter


Just like my other Halloween treat recipes, such as halloween popcorn balls, krispie treats are a great option for making with the kids.

You’ll need crisped rice cereal, butter, and marshmallows. I like to use mini marshmallows because they melt more evenly, and they’re already the perfect size for mixing extra puffy bites of marshmallow.

To make these Halloween-ready, I added plenty of festive sprinkles. 

Spatula stirring marshmallows in a saucepan

For thick, bakery-sized treats, use a square 9×9 pan. If you prefer thinner rice krispie treats, you can use a 9×13-inch pan.

Make sure to grease the pan well and use a buttered spatula to press the mixture into the pan. You don’t want it sticking to everything!

Halloween rice krispie treats being mixed with a spatula in a saucepan

Top them off with a quick buttercream frosting and more sprinkles.

If you haven’t had frosted cereal treats before, you’re in for a treat. Spread on a full layer like in my frosted maple pecan marshmallow treats, or you can keep it simple like berry cereal treats with a drizzle of melted white chocolate.

Unfrosted halloween rice krispie treats in a parchment-lined metal pan


Want to change up these Halloween snacks a bit? Use sprinkles to add spooky flair to pumpkin spice marshmallow treats or brown butter rice krispie treats.

You can also use flavored marshmallows. There’s so many fun options out now, from strawberry to chocolate to birthday cake which would be awesome in these birthday marshmallow cereal treats!

Unfrosted halloween rice krispie treats, sliced and set on a piece of parchment next to a bag of buttercream frosting


Krispie treats are best the same day they are made, but you can keep them in an airtight container for about 3 days.

Air and humidity can make the treats too soft or soggy, so if you use a zip-top bag, be sure to remove any extra air.

Overhead view of sliced and frosted halloween rice krispie treats on a piece of parchment paper

If your treats are too hard, you can pop them into the microwave for a few seconds to soften. Just a few — you don’t want the buttercream to melt!

You can freeze krispie treats too, even with the frosting. 

Wrap each treat in foil or waxed paper, then place in a freezer-safe container. Storing for up to 3 months.

Close up of frosting halloween rice krispie treats topped with halloween sprinkles

When you’re ready to enjoy a treat, remove the number of servings you need and let them thaw at room temperature for at least an hour. 

Looking for other Halloween treats for kids (or special grown-ups)? Halloween monster decorated sugar cookies and Halloween dirt cake are a super fun way to celebrate.

Frosted Halloween rice krispie treats topped with Halloween sprinkles on a piece of parchment paper
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Halloween Rice Krispie Treats

By: Jamie
No ratings yet
Prep: 20 minutes
Total: 20 minutes
Servings: 9 large treats
These Halloween Rice Krispie Treats are a simple way to celebrate Halloween! Load them up with festive sprinkles or add in some of your favorite candies.


  • 6 tablespoons unsalted butter
  • 2 packages mini-marshmallows 10 ounces each, divided use
  • 9 cups Rice Krispies cereal
  • cup Halloween sprinkles
  • ½ cup unsalted butter room temperature
  • 1 ½ cups powdered sugar sifted
  • 1 ½ teaspoons pure vanilla extract
  • 1-3 teaspoons milk


  • Line a 9 x 9-inch baking pan with parchment paper or foil and spray with nonstick cooking spray.
  • In a large pan, melt butter over low heat. Set aside 1 1/2 cups marshmallows. Add the rest of the marshmallows to the pan and stir until completely melted. Remove the pan from the heat.
  • Gradually add crisped rice cereal; stirring until well coated. Fold in the reserved 1 1/2 cups of marshmallows and sprinkles until thoroughly incorporated.
  • Using a buttered spatula or clean hands to firmly press the mixture into the prepared pan. Cool completely.

For the Buttercream

  • In the bowl of a stand mixer fitted with the paddle attachment, or in a large bowl with an electric mixer, beat butter on medium-high speed for about 5 minutes.
  • With the mixer on low speed, slowly add in powdered sugar, and continue beating until well blended.
  • Add in vanilla, and 1 teaspoon of milk. Mix on low speed until incorporated.
  • Beat at high speed until frosting is smooth and fluffy; about 4-5 more minutes. If your frosting is too thick, gradually add a little more milk, 1 teaspoon at a time until you reach the desired consistency.
  • Spread or pipe frosting onto cooled marshmallow cereal treats and top with festive sprinkles.



Try decorating the tops of these treats with your favorite candies, such as mini candy corn or Reese’s Pieces, as well.
For thinner treats, press the mixture into a 13×9-inch pan instead of the 9×9-inch pan.


Serving: 1treat, Calories: 569kcal, Carbohydrates: 101g, Protein: 3g, Fat: 19g, Saturated Fat: 12g, Polyunsaturated Fat: 1g, Monounsaturated Fat: 5g, Trans Fat: 1g, Cholesterol: 47mg, Sodium: 201mg, Potassium: 46mg, Fiber: 0.2g, Sugar: 64g, Vitamin A: 2412IU, Vitamin C: 18mg, Calcium: 10mg, Iron: 9mg

Nutrition information is automatically calculated, so should only be used as an approximation.