Mars Bar Crispy Squares!

A Yummy, Marshmallowy, Mars-Bar-y twist on Rice Crispy Cakes – Perfect treat to make with your kids, or even yourself if you fancy!


I have made many a tray bake recipe in my time on this blog, and they’re all delicious – as well as many cupcake recipes and so on! However, I realised that none of these are really suited for ‘kids baking’ or would be what some would consider child friendly as they use mixers and such. I have some regular readers that I know bake with their children, but I have had requests for child friendly recipes – so I hope this suits! This recipe does require a pan and heating, but they’re super duper easy to make, and they’ll go down a treat!

I love Mars Bars, evident by my Mars Bar Chocolate Mousse recipe, but these are simply delightful. When I was little, Rice Krispie cakes were an absolute must at a bake sale, or at a party – and they still are now!


These are chewy, crunchy, sweet, and soft all in one – I love to drench by crispy squares in chocolate, and add even more chocolate with all the different sprinkles – how can you resist?! They’re so easy and tasty to make! Also – these went down an absolute storm at where my parents work – which is in education, will all adults being the taste testers and everyone LOVED them! Some people saying stuff like “takes me back to my childhood” which is ideal!

I really hope you guys like these, and that if you make them with your kids – that they like them too!


This recipe makes 16-20 squares!


– 150g Mars Bars, chopped up
– 200g Mini Marshmallows
– 50g Unsalted Butter
– 225g Rice Krispies/Cocoa Pops
– 250g White Chocolate
– Chocolate Sprinkles



1) Line a 9x9inch square tray with parchment paper and leave to the side.

2) In a medium sized pan, add your small mars bar chunks, mini marshmallows, and butter – heat on a low heat, stiring frequently, until the mixture has melted. At first it may look lumpy, but after a while, and a bit of beating it’ll be smooth.

3) In a large bowl, pour your Rice Krispies/Cocoa Pops and pour the smooth melted mixture on top – mix together until all of the Rice Krispies are covered evenly – this can take a bit of welly but its worth it!

4) Press down into your tray evenly and leave to set – can take 3-4 hours. The mixture is very sticky, so you may want to use gloves, or the back of a spatula!

5) Once set, cut the pieces into squares, drizzle over some melted White Chocolate, and sprinkle with little chocolatey treats! Heaven!


Tips and Ideas

This is a delicious treat that you can make with your kids – I like using mars bars, as they were a favourite treat of mine when I was little, but if you don’t like them or can’t get them then use 250g Mini Marshmallows, and 100g Chocolate Chips!

These last 2-3days in an airtight container! And you can make them into individual crispy cakes just as easily if you prefer! 🙂



You can find my other Tray Bake Recipes on my Recipes Page!

You can find me on:

J x

© Jane’s Patisserie. All images & content are copyright protected. Do not use my images without prior permission. If you want to republish this recipe, please re-write the recipe in your own words and credit me, or link back to this post for the recipe.

Previous Post Next Post

You Might Also Like

No Comments

  • Reply Linda October 24, 2015 at 11:01 am

    Oh they are sooo good. I needed to get rid of my cocoa pops and this recipe was perfect for that. 🙂

  • Reply abbiosbiston October 7, 2015 at 12:45 pm

    I love rice krispie squares. The best ones I ever managed to make had peanut butter in them and they were irresistible!

  • Reply Mars Bar Crispy Squares! | a little cream & sugar October 2, 2015 at 10:35 pm

    […] Source: Mars Bar Crispy Squares! […]

  • Reply Lauren at Knead to Dough October 2, 2015 at 1:23 pm

    Also, totally off topic but who designed your picture? 🙂 I’ve seen a few similar ones about and was contemplating getting one done!

  • Reply Kim @sweetontreats October 2, 2015 at 11:32 am

    Love these!!! ?

  • Reply Lauren at Knead to Dough October 2, 2015 at 10:37 am

    I’m starting to think you’re a Mars Bar addict, Jane! These look scrummy though 🙂 I actually have a Terry’s Chocolate Orange crispy cake coming up next Tuesday too, great minds think alike!

    • Reply Jane's Patisserie October 2, 2015 at 4:57 pm

      Hahah I am, although I’m more of a chocolate orange addict ? and thanks! I look forward to seeing your recipe!

    Leave a Reply

    %d bloggers like this: