Cheerios and peanut butter bars recipe

(32 ratings)

Whip up these Cheerios and peanut butter bars in less than 20 mins. These delicious bars are easy to make with the kids

Preparation Time20 mins
Total Time20 mins plus setting time
Cost RangeCheap

These Cheerio and peanut butter bars are full of crunch and flavour. The sweetness of the marshmallow cuts through the peanut butter in the most delicious way! Little helpers can do all the weighing out for this recipe while you do the stirring; it's most definitely a joint effort. A no-bake recipe which contains just five ingredients and is made in less than 20 minutes, what more could you ask for?!

Want to know which cereal bars are best and worst for your diet? Click here!


  • 275g mini marshmallows
  • 25g butter
  • 200g Cheerios
  • 150g peanut butter
  • 50g M&Ms




  1. First of all, line a deep 8 inch tin with cling film. Make sure the cling film overhangs the sides of the tin as this will make it easy to remove the bars from the tin later on.
  2. It's a good idea to weigh all of the ingredients before you start, so that they are ready for when you need them. Once the marshmallows are melted things will need to be done quickly! So, ask your child to help weigh the mini marshmallows and butter into a large microwaveable mixing bowl. Take another, larger bowl and weigh in the Cheerios and most of the M &Ms. Keep back a handful of the M&Ms for later. No, don't eat them!!
  3. Last of all, weigh the peanut butter into a small bowl or dish.
  4. Now it's time to start to bring all those ingredients together. First of all, place the bowl containing the marshmallows and butter into the microwave and heat on high, in 20 second intervals, stirring in between.
  5. Once the marshmallow mixture has melted, quickly stir in the peanut butter. Place the bowl back into the microwave for a further 15 seconds. This will soften the peanut butter and make it easier to stir into the marshmallow mixture.
  6. Quick as a flash, pour the Cheerios and M & Ms into the sticky peanut butter and marshmallow mixture and stir to combine. This will take a little elbow grease as the mixture will start to set almost immediately.
  7. As soon as the ingredients have combined, tip into your awaiting tin and use your knuckles to press down into the tin. If the mixture isn't too hot, your child can happily carry out this task.
  8. Ask your helper to quickly scatter the remaining M & Ms over the surface of the bars. They may need to press them firmly into place, as the mixture sets so fast.
  9. Leave the bars to set for an hour or so and then use a sharp knife to slice into tall slices.
Top Tip for making Cheerios and peanut butter bars

You could swap the peanut butter for Nutella instead


Trusted, informative, and empathetic – GoodToKnow is the ultimate online destination for mums. Established in 2007, our 15-year-strong archive of content includes more than 18,000 articles, 1,500 how-to videos, and 7,000 recipes.