Cheerio and M&M Cereal Bars

Our family loves dressing up classic Cheerios cereal with M&Ms, peanut butter and marshmallows to make super easy Cheerio and M&M Cereal Bars!  This recipe is made in the microwave which saves time.

Cereal bars are perfect for breakfast and snacks.  I like to make them for soccer team snacks!

square cheerio cereal bar on a white plate next to dish full of cereal bars on yellow plaid napkin

Cereal Bar Recipe

Having a toddler at home we always have Cheerios in the cupboard.  And just like our Homemade M&M Cookies, and Funfetti Cake Mix Cookies, Cheerios are better dressed up with M&Ms.  When our aunt shared this recipe we loved the idea of dressing up Cheerios into a treat we can all enjoy!

The kids eat cereal for breakfast, after school and bedtime snacks.  My husband eats granola bars.  We all look forward to a good cereal bar because it’s a cross between a bowl of cereal and a granola bar. Cheerio and M&M Cereal Bars can also make a nice no-bake dessert.

We take cereal seriously in our house!  We love cereal so much that we have several recipes with cereal.  Our favorites with crispy rice cereal are Chocolate & Peanut Butter Rice Krispie Treats and Oreo Cookie Treats 

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Lucky Charms Cereal works great in Easy Unicorn Snacks and St. Patrick’s Day Treats.  Chex mix cereal becomes a dessert in Pay Day Crunch and our Reese’s Puffs Cereal Bars are irresistible!

With growing kids there are always school parties, sports or clubs that need snacks.  The Cheerios are a filling and healthy base.  Peanut butter adds protein and the marshmallows and M&Ms make the kids really want to eat them!

This is the first cereal bar recipe that I’ve ever made in the microwave and I love how much time this method saves.

9 x 13 pan of cereal bars topped with regular M&Ms

How to Make Cereal Bars in the Microwave

  1. Place butter and marshmallows in a microwave-safe bowl; microwave for one minute.
  2. Quickly stir in peanut butter and remaining ingredients in the order listed.
  3. Add Cheerios and mix.
  4. Add M&Ms and mix.
  5. Use wet fingers to press into a greased 9 x 13 pan

Cereal Bar Tips

  • Have all ingredients measured out before starting the microwave because the marshmallows will set up fairly quickly
  • We like to reserve a few M&Ms to sprinkle on top, but they must be added and pressed down quickly to stick
  • Regular or Honey Nut Cheerios can be used
  • Make sure cereal is fresh, I may have used slightly stale cereal before which makes the bars taste stale
  • All cooking appliances and conditions are different, so you should test these times and guidelines first in your own appliance to determine what adjustments may be needed!
Collage of cheerio cereal bars made with Cheerios, marshmallows, peanut butter and m&ms

Other Easy No-Bake Recipes

Printable Cheerio and M&M Cereal Bar Recipe

Square Cheerio cereal bar with M&Ms on a white plate

Cheerio and M&M Cereal Bars

Servings 20 cereal bars
Jennifer @ Plowing Through Life
Our family loves dressing up classic Cheerios cereal with M&Ms, peanut butter and marshmallows to make super easy Cheerio and M&M Cereal Bars!  Cereal bars are perfect for breakfast and snacks.
Prep Time 10 minutes
Cook Time 1 minute
Total Time 11 minutes

Ingredients
  

  • 10 ounces mini marshmallows
  • 3 tablespoons butter
  • 1/2 cup peanut butter
  • 5 cups Cheerios
  • 10 ounces M&Ms

Instructions
 

  • Place butter and marshmallows in a microwave-safe bowl; microwave for one minute.
  • Quickly stir in peanut butter and remaining ingredients in the order listed.
  • Add Cheerios and mix, then add M&Ms and mix.
  • Use wet fingers to press into a greased 9 x 13 pan. Sprinkle a few M&Ms on top and press into cereal bar mixture if desired.

Notes

  • Have all ingredients measured out before starting the microwave because the marshmallows will set up fairly quickly
  • We like to reserve a few M&Ms to sprinkle on top, but they must be added and pressed down quickly to stick
  • Regular or Honey Nut Cheerios work well in this recipe
  • Make sure cereal is fresh, I may have used slightly stale cereal before which makes the bars taste stale
  • All cooking appliances and conditions are different, so you should test these times and guidelines first in your own appliance to determine what adjustments may be needed!

Nutrition

Calories: 189kcalCarbohydrates: 26gProtein: 3gFat: 9gSaturated Fat: 4gCholesterol: 7mgSodium: 96mgPotassium: 76mgFiber: 1gSugar: 18gVitamin A: 257IUVitamin C: 1mgCalcium: 41mgIron: 2mg

Nutritional Disclaimer

“Plowing Through Life” is not a dietitian or nutrition professional. Any nutritional information shared is an estimate and can vary greatly depending on specific products are used. If calorie count and other nutritional values are important to you, we recommend running the ingredients through an online nutritional calculator of your choice.

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