Halloween Rice Krispie Treats with M&Ms: Fun Spooky Snack Ideas

Ghoulishly delightful Halloween Rice Krispie Treats with M&Ms — a simple, festive treat that’s perfect for kids and adults alike.

Rice Krispie treats are a classic for a reason: they’re fast, no-bake, and endlessly customizable. For Halloween, adding seasonal M&Ms, white chocolate drizzle, and spooky sprinkles transforms the basic treat into something fun and festive the whole family will enjoy.

Why You’ll Love These Halloween Rice Krispie Treats

• Kid-friendly and fun to make—children love decorating their own spooky squares.
• No-bake and quick: much easier and faster than many cookie or cake recipes.
• Great for parties, lunchboxes, or a homemade Halloween treat swap.
• They look adorable and taste delicious.

Ingredients

This recipe uses the simple ingredients of a classic Rice Krispie treat, with a few seasonal add-ins.

• Crispy rice cereal (about 6 cups)
• Mini marshmallows (about 5½ cups)
• Unsalted butter (about 5 tablespoons)
• Ghoul’s Mix M&Ms (or other Halloween M&Ms) — about 1½ cups, reserve 2 tablespoons
• White chocolate or vanilla candy melts (about 3 oz)
• Assorted Halloween sprinkles (spiders, bugs, candy eyes, etc.)

Pick seasonal sprinkles and candy from the grocery or craft store and have fun with color and texture.

How to make Halloween Rice Krispie Treats with M&Ms

Step 1: Make the Rice Krispie base

Line a 9″ x 9″ baking pan with parchment paper, leaving an overhang to make a sling. Lightly spray the parchment and pan with cooking spray.

Measure and set aside 2 tablespoons of M&Ms in a small bowl. Place the rice cereal in a large mixing bowl and set aside.

In a 2-quart saucepan over medium-low heat, melt the butter and marshmallows, stirring constantly until smooth. Remove from heat and immediately pour the melted marshmallow mixture over the cereal.

Using a rubber spatula (lightly sprayed with cooking spray to reduce sticking), quickly fold the marshmallow mixture into the cereal until evenly coated.

Stir in all but the reserved 2 tablespoons of M&Ms at the last moment so the candy colors don’t melt. Transfer the mixture to the prepared pan and press evenly and firmly. For a clean pressing method, spray plastic wrap with cooking spray and press with that over the top of the mixture.

Once pressed, sprinkle the reserved 2 tablespoons of M&Ms on top and gently press them into the surface so they adhere.

Let the treats sit for about 2 hours to set completely.

Step 2: Decorate

When set, lift the treats from the pan using the parchment sling. Discard the parchment, trim the edges for a neat square, and cut into 12 portions.

Melt the white chocolate or candy melts in the microwave in short bursts, stirring between each, or use a double boiler. Drizzle the melted coating over each treat with a spoon or piping bag and add Halloween sprinkles before the drizzle sets. Allow the coating to harden before serving.

Pro Tip

Use the reserved M&Ms to cover any squashed candies. Pressing the mixture into the pan can squash some M&Ms on the surface—save a small amount and place fresh pieces on top to hide imperfections.

Storing Your Treats

Store finished Rice Krispie treats at room temperature in an airtight container or well-sealed plastic wrap. Kept sealed, they remain soft and chewy for several days. Avoid refrigerating or freezing, as that can dry them out.

Keep Them Soft: Tips

1. Use plenty of marshmallows. The extra marshmallow keeps the treats moist and chewy.
2. Add a little extra butter. A touch more butter adds fat and moisture that slows drying.
3. Use a smaller pan for thicker treats. Less surface area exposed to air helps retain moisture.
4. Wrap tightly. Store in an airtight container or tightly wrapped in plastic to keep air out.

Variations

M&Ms are an easy way to add Halloween color, but try other mixes and decorations for variety:

• Fold in chilled candy corn (chill before adding so it holds up better).
• Use themed sprinkles to create mummies, monsters, ghosts, or witches.
• Cut treats into shapes (pumpkins, ghosts, gravestones) from a larger pan and decorate with colored candy melts.
• Pipe black frosting for faces and other ghoulish details.
• Dip whole squares in colored candy melts for a coated finish and extra decoration.

Let your creativity run wild—these treats are forgiving and a great canvas for spooky designs.

Dipped Rice Krispie Treats

You can dip Rice Krispie squares in colored candy melts and finish with sprinkles and themed candies for a polished look. This method also works well for pretzel rods and other Halloween snacks.

Quick Tips for Success (Halloween Edition)

• Prep the baking dish. Parchment and cooking spray prevent sticking and make removal easy.
• Work quickly. Marshmallow mixture sets fast—mix and press without delay.
• Add M&Ms at the right time. Stir them in at the end to avoid melting and color bleed.
• Use plastic wrap to press. Spraying the wrap keeps hands clean and gives even pressure.

Recipe Summary

Ingredients

• 6 cups Rice Krispie cereal
• 5½ cups mini marshmallows
• 5 tablespoons unsalted butter
• About 1½ cups Ghoul’s Mix M&Ms (reserve 2 tablespoons)
• 3 oz white chocolate or vanilla candy coating
• Assorted Halloween sprinkles (spiders, bugs, candy eyes)

Instructions

1. Line a 9″ x 9″ pan with parchment, leaving an overhang. Grease parchment and pan.
2. Reserve 2 tablespoons of M&Ms in a small dish. Place cereal in a large bowl.
3. Melt butter and marshmallows in a saucepan over medium-low heat, stirring until smooth.
4. Remove from heat and pour marshmallow mixture over cereal. Stir quickly to coat.
5. Fold in all but the reserved M&Ms at the last moment. Transfer to the prepared pan and press firmly.
6. Sprinkle reserved M&Ms on top and press lightly to adhere. Let set for about 2 hours.
7. Lift from pan, trim edges, and cut into 12 squares.
8. Melt white chocolate or candy coating and drizzle over each square. Add sprinkles and allow drizzle to set before serving.

Nutrition (per serving)

Calories: 256 kcal | Carbohydrates: 42 g | Protein: 2 g | Fat: 9 g | Sugar: 25 g

These Halloween Rice Krispie Treats are quick, crowd-pleasing, and easy to customize—perfect for a party, school event, or just a spooky snack at home.