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Halloween Rice Krispie Treats

These easy Halloween Rice Krispie Treats are a fun no-bake dessert made with buttery marshmallows, crispy rice cereal, and festive Halloween sprinkles. Ready in just 15 minutes, they are perfect for Halloween parties, kids, classroom treats, and spooky celebrations.
Print Recipe Pin Recipe
Prep Time 15 minutes
Total Time 15 minutes
Course: Dessert, Snack
Cuisine: American
Ingredients Equipment Method Notes

Ingredients
  

Halloween Rice Krispie Treats
  • 3 tablespoons butter melted
  • 1 10-ounce bag marshmallows
  • 6 cups Rice Krispies cereal
  • Halloween sprinkles as desired
For the Pan
  • nonstick cooking spray as needed

Equipment

  • 9×13-inch baking pan
  • Large microwave-safe bowl
  • Silicone spatula or wooden spoon
  • Measuring cups and spoons

Method
 

Prepare the Pan
  1. Lightly coat a 9×13-inch baking pan with nonstick cooking spray and set aside.
Melt the Marshmallows
  1. Melt the butter in a large microwave-safe bowl.
  2. Add the marshmallows to the melted butter and stir to coat.
  3. Microwave for 45 seconds, remove the bowl, and stir well.
  4. Return the bowl to the microwave and heat for another 45 seconds. Remove and stir until the marshmallow mixture is smooth and completely melted.
Add the Cereal
  1. Add the Rice Krispies cereal to the melted marshmallow mixture.
  2. Stir gently until all of the cereal is evenly coated with the marshmallow mixture.
Shape and Decorate
  1. Transfer the cereal mixture to the prepared 9×13-inch pan and distribute it evenly.
  2. Press the mixture firmly into an even layer.
  3. Immediately sprinkle Halloween sprinkles evenly over the top, gently pressing them into the surface so they stick.
Serve
  1. Allow the treats to set as needed, then cut into squares or rectangles and serve.

Notes

  • Yield: The original recipe does not specify the number of servings, so the servings field has been left blank.
  • No-bake dessert: These treats are prepared in the microwave and do not require oven baking.
  • Microwave time: The marshmallows are heated for two 45-second intervals, stirring between each interval.
  • Do not overheat: Heat the marshmallows only until smooth and melted. Excessive heating can make the finished treats firmer.
  • Pressing the mixture: Press firmly enough to create an even layer, but avoid packing the cereal excessively if you prefer softer treats.
  • Sprinkles: Add the Halloween sprinkles while the mixture is still warm and sticky so they adhere well.
  • Pan size: A 9×13-inch pan produces classic bar-style Rice Krispie treats.
  • Storage: Store the treats in an airtight container at room temperature for the best texture.