October 6, 2023

Monster Mash-mallow Cereal Bars #HalloweenTreatsWeek

Baking dish of finished monster mash-mallow cereal bars.

Monster mash-mallow cereal bars are a super easy treat to make for the Halloween season that are sure to be a hit with kids and fans of monster cereals.

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Monster cereals are full of childhood nostalgia for me, and I'm sure for many others. I love getting a box or two each year for my kids now and they look forward to them every year. 

This year, we saw a new Monster Cereal called Carmella Creeper™that is a caramel apple flavor. Of course we had to try it and it inspired me to make a batch of Monster Mash-Mallow Cereal Bars since Carmella is a DJ Zombie.

Cut squares of monster mash-mallow cereal bars.

Carmella Creeper™ made delicious flavored cereal bar treats. The caramel apple flavor is also a great flavor for fall.

You can use any of the monster cereals that you like in this recipe though. Count Chocula™, Franken Berry™, and Boo Berry™ can all be used instead. Some years you will find other flavors available as well.

I love the green color of this cereal for Halloween and the color is another reason I decided to make these cereal bars with the caramel apple flavored monster cereal. That green is super fun and fitting for a zombie.

Serving monster mash-mallow cereal bars.

Making Monster Mash-mallow Cereal Bars

These cereal bar treats are so simple to make. They are just like treats made from crispy rice cereal, but made with monster cereal instead. 

This recipe only requires cereal, mini marshmallows, and butter. You also need some cooking spray to keep them from sticking to the baking dish. These cereal bars don't require any baking, and they are quick to make. 

In a large pan, heat the butter until melted. Stir in a bag of mini marshmallows until melted. 

You can do this step in a large microwave-safe bowl as well using the microwave. Heat the butter until melted and then stir in the marshmallows. Heat for about 30 seconds intervals and stir until melted and smooth.

Once the mixture is all melted and smooth, remove from the heat and stir in the cereal. Do this step quickly. It's best to have the cereal measured and ready to go. Spread into a greased baking dish. 

Then you will need to press the cereal mixture down into the dish in an even layer. It will be very sticky, so use either a piece of wax paper or a wooden spoon that has been sprayed with a little cooking spray. Cool and cut into squares to serve.

Close-up of a monster mash-mallow cereal bar.

Monster Mash-mallow Cereal Bars were a big hit with my kids and some of their friends. They've already asked to make them again with a different monster cereal. 

These monster cereal bars are best eaten within a couple of days. Cover them loosely with plastic wrap (not in an airtight container) to help keep them fresh and not too chewy.

Side view of the inside of a cut monster mash-mallow cereal bar.

Give these monster cereal bars a try this Halloween! They are sure to make fans of monster cereal smile and are super easy to make for a Halloween party, movie night, or kids' gathering.

Yield: about 15 bars
Author: Amy (Savory Moments)
Monster Mash-mallow Cereal Bars

Monster Mash-mallow Cereal Bars

Monster mash-mallow cereal bars are a super easy treat to make for the Halloween season that are sure to be a hit with kids and fans of monster cereals.


  • cooking spray
  • 3 tablespoons unsalted butter
  • 1 bag (10 oz.) mini marshmallows
  • 5 cups monster cereal of your choice


  1. Lightly spray a 7" x 11" baking dish with cooking spray.
  2. In a large pan, melt the butter over medium heat. When melted, stir in the marshmallows. Turn the heat to low and stir until melted.
  3. Remove from the heat. Stir in the cereal until well-combined.
  4. Spread the mixture into the baking dish. Use a piece or wax paper, or a wooden spoon sprayed with cooking spray, to push down the cereal into an even layer.
  5. Let cool about 30 minutes. Cut into squares. Serve.
  6. Loosely cover any leftovers and eat within a couple of days.
Did you make this recipe?
Tag @savory_moments on instagram and hashtag it #savorymoments

I hope you give these Monster Mash-mallow Cereal Bars a try! Let me know in the comments below.

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Pumpkin bowl with monster mash-mallow cereal bars.

Check out these other Halloween dessert recipes:

Sheet Pan Halloween Confetti Cookie Bars

White Chocolate Mummy Crispy Rice Treats

Vampire Bat Marshmallow Pops

Oogie Boogie Dark Chocolate Brownies

Halloween treats week logo.


Welcome to 2023’s #HalloweenTreatsWeek event!

If you're new here, Welcome! If you're a returning haunt, welcome back!

#HalloweenTreatsWeek is a yearly Halloween blogging event that is hosted by Angie from Big Bear’s Wife . You'll find that this fun and spooky event is an online, week-long event that is filled with some frightfully fun Halloween treats and recipes from some fantastic Halloween loving bloggers!

For this years 6th annual #HalloweenTreatsWeek event we have 18 hauntingly talented bloggers that are sharing their favorite Halloween recipes throughout the week! You can following the hashtag #HalloweenTreatsWeek on social media to collect all of these frightful recipes to use at your own Halloween parties and events!

Make Sure to check out all of the fun Halloween recipes that we're sharing this week!

Today's Halloween Offerings:

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