Marshmallow Bars

Our slimming-friendly version of these Marshmallow Bars make a tasty treat whether you’re counting calories or following a diet plan like Weight Watchers.

Marshmallow Bars | Slimming & Weight Watchers Friendly

For the full list of ingredients and comprehensive instructions, please see the recipe card at the end of this post. Before you scroll, there’s important stuff in the blurb 👍

These Marshmallow Bars were created by Michelle from our Facebook group! So easy and simple to make, they’re the perfect sweet snack!

We’ve got loads of great sweet snacks for you to try – they’re all sooo delicious and easy to make!

How many Calories are in these Marshmallow Bars?

There are 248 calories in each portion of our slimming friendly Marshmallow Bars recipe. This means it falls into our Everyday Light recipe category.

This recipe is perfect if you’re following a calorie controlled diet, and fits well with any one of the major diet plans such as Weight Watchers.

As a guide, an average man needs around 2,500kcal (10,500kJ) a day to maintain a healthy body weight. For an average woman, that figure is around 2,000kcal (8,400kJ) a day. Obviously, if your goal is to lose weight then you might want to adjust these slightly! You can read more about these recommendations on the NHS website.

What diets is this Marshmallow Bars suitable for?

This recipe is suitable if you’re gluten free as long as you swap out the following ingredients for gluten free versions; 

  • Cheerios/cereal

You could also enjoy this Marshmallow Bars recipe if you’re dairy free.

Please make sure to double, and triple check all of your ingredients if you’re cooking for people with allergies.

How Weight Watchers friendly are these Marshmallow Bars?

You’d expect sweet treats like these to be packed full of Points, but these bars have 8 Points per portion!

You could even halve the recipe for less Points as it makes a generous portion.

How to make these Marshmallow Bars

There probably isn’t a more straight forward recipe out there! Here’s a summary;

  • Melt the marshmallows in the microwave and quickly combine with the Cheerios

Marshmallow Bars | Slimming & Weight Watchers Friendly

  • Press into a dish to set

Marshmallow Bars | Slimming & Weight Watchers Friendly

  • Cut into bars

Do you need any special ingredients to make Marshmallow Bars?

When we say a recipe is simple, we really mean it! All you need are just 2 ingredients.

    • Less than 5% sugar Cheerios
    • Sugar-free mini marshmallows

Marshmallow Bars | Slimming & Weight Watchers Friendly

Sugar-free mini marshmallows?! Yup! We got ours from a specialist catering supplier, but you can pick them up from some supermarkets too. You could also use normal marshmallows but you’d need to check the nutritional information as they will vary depending on the brand.

Can you cook Marshmallow Bars another way?

There’s not really any cooking involved, but we do use a microwave to melt the marshmallows. You could melt them in a heat proof bowl, over a saucepan of boiling water. It will take slightly longer but you should get the same results.

How long can you keep Marshmallow Bars?

Once you’ve made them, ideally they should be eaten within 4 hours.

You should keep these in an airtight container and consume within 3 days as they will go stale.

Can I freeze Marshmallow Bars?

This recipe isn’t suitable for freezing.

Some of you love this Marshmallow Bars recipe!

Marshmallow Bars | Slimming & Weight Watchers Friendly
One of our Instagram followers @mama_sw made this dish and loved it!

If you make this recipe, snap a pic and hashtag it #pinchofnom — We love to see your creations on Instagram, Facebook, & Twitter!

Marshmallow Bars | Slimming & Weight Watchers Friendly

Fallen off the wagon and need some motivation, or want to help others on their journey?

Our Facebook group is growing by the day. If you haven’t joined yet head over there and take a look. You wouldn’t want to miss out on the fun would you?

Marshmallow Bars | Slimming & Weight Watchers Friendly

You might just find the inspiration you need from our awesome members. If you’ve joined already why not invite any friends that may find it helpful?

Pre-Order Our Second Cookbook Now! 

We are SO excited to announce that our second cookbook, Pinch of Nom: Everyday Light is being released on 12 December 2019 and is available for pre-order now!!!

As the name suggests, this book is entirely focused on meals you can make every day that all come in at 400 calories or less…INCLUDING accompaniments!

There will be 100 NEW & EXCLUSIVE recipes for you to enjoy that are easy, delicious and make slimming hassle-free.

As ever, all the recipes have been tried and tested by our lovely army of recipe testers to ensure that they are amazing. Check out our cookbook page for more information!

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We are super excited to have released a 6 month food planner that works perfectly alongside our recipe book.

Our 6 month planner features 26 recipes – which are not available anywhere else. We have all the details on our Planner page.

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We’ve been squirrelling away doing squirelly things behind the scenes and can finally announce that our very first cookbook is available NOW!!

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The book features 100 recipes – around 80 of them BRAND NEW and not available anywhere else. Full colour photographs, hardback, a quality book that will stand up to frequent use!

Each recipe has been taste tested by twenty members of the Pinch of Nom community to ensure that they are amazing. Check out our cookbook page for more information!

Marshmallow Bars | Slimming & Weight Watchers Friendly

Votes: 14
Rating: 4.5
Rate this recipe!


Prep Time

Cooking Time

person 3 minute 1 minute




248kcal 8

Smart Points (Flex/Freestyle)

Coming Soon

Per person Per person Per person
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  1. Melt the marshmallows in a glass bowl in the microwave. This will only take 10-15 seconds!
  2. Once melted, give it a stir. We'd recommend using a silicone spatula, as it makes the molten marshmallow easier to work with.
  3. Add the Cheerios to the molten marshmallows and stir well to combine. You will need to move quickly, as the marshmallow will stiffen as it cools. If you need to, return the mix to the microwave for 5 seconds at a time, to loosen the mixture up.
  4. Tip the cheerio-marshmallow mix into a rectangular/square dish, and flatten. You may need to use a spoon or knife heated in water for this bit! It'll make the mix much easier to spread. If you run into difficulty, and the mix is too stiff, just pop it back in the microwave for 5 seconds at a time.
  5. Cover with clingfilm and place in the fridge to set. It'll take 30 minutes to set, so you don't have that long to wait to enjoy your Marshmallow Bars!
  6. Gently prise the mixture away from the bowl. You will need to cut around the edge with a sharp knife first. Tip onto a chopping board, and cut into how many pieces you like and enjoy!

If you make this recipe, snap a pic and hashtag it #pinchofnom — We love to see your creations on InstagramFacebook, & Twitter!


We use a fan assisted oven for all of our recipes. Need help converting the temperature for your oven? 

Click here for our oven temperature conversion guide.


Although attempts to provide accurate nutritional information, these figures should be considered estimates. Varying factors such as product types or brands purchased, natural fluctuations in fresh produce, and the way ingredients are processed change the effective nutritional information in any given recipe. Under no circumstances will be responsible for any loss or damage resulting for your reliance on nutritional information.

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  1. That’s amazing!! I had to do a double take when reading lol… Michelle’s my friend and went to the same sw group as me 🙂 x

  2. What if you don’t have a microwave? I LOVE the idea of this!! Do you think I could heat the marshmallows in a pan?!

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Slimming World Recipes
A blog started by 2 chefs on their Slimming journey, evolving into an epic adventure shared by many!