How To Make Your Own Cereal Bars – using up cereal leftovers

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make-cereal-barsCereal has become a school-day breakfast staple in our house. It’s quick, it’s easy, the kids love it and it gets us out the house with minimal fuss each morning.

I know cereal isn’t the perfect breakfast choice. I’m not trying to be perfect.  I buy the wholegrain, healthier versions when I can, but some days, I just cave to the demands for Weetos.

We have a cupboard full of half-eaten boxes of cereal the kids have now lost all interest in and it seems so wasteful to throw them away. Instead, I’ve devised a way to re-purpose the cereals into on-the-go cereal snack bars

Make Your Own Cereal Bars


  • 1 serving (approx 30g) cereal
  • 12g mini marshmallows

Optional: melted chocolate to drizzle, sprinkles, desiccated coconut


  • Place cereal into a microwave-proof bowl and top with mini marshmallows
  • Microwave on high for approximately 20 – 30 seconds, until marshmallows become molten and puffy
  • Quickly stir to combine ingredients
  • Empty ingredients onto a small piece of greaseproof baking paper and pull the sides around to shape into a bar
  • If adding sprinkles, top your cereal bar with chosen topping before the marshmallow begins to harden
  • Put in fridge to set

how to make cereal bars

My Cereal Bars

From left to right

#1 – Branflakes with sultanas + pink marshmallows + chocolate drizzle + desiccated coconut
#2 – Weetos + white marshmallows + pink sprinkles
#3 – Cherry muesli + white marshmallows

May Your Own Slimming World ‘HiFi’ Cereal Bars

If like me you follow the Slimming World plan, you can enjoy these cereal bars too. Simply use a ‘Healthy B Choice’ cereal for a high fibre boost and to safeguard your weight loss success.

Check your book or app for the full list, but my faves include:

  • 35g Dorset Cereals Simply Delicious Muesli
  • 30g Kelloggs All-Bran Red Berry Crunch
  • 35g Kelloggs All-Bran Sultana Bran
  • 35g Sainsburys Puffed Wheat
  • 35g Nestle Shreddies
  • 30g Weetabix Chocolate Spoonsize (crushed)

… and 12g of marshmallows are just 2 syns on the Slimming World plan.


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  1. Jo says

    Great idea, i too follow slimming world it annoys me how they can use chocolate etc and still keep it as a heb. Tho at least i can still get a chocolate fix without using syns….

  2. Beverley Price says

    I’m looking for a low calorie cereal bar to make with coffee flavour and preferably with rice crispies, have you any recipes please

  3. says

    such a great idea, I always through away the remains when it doesn’t make a full portion. I will remember to try these next time : )
    (also following slimming world)

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