Looking for a quick and delicious treat? This Mars Bar Slice is a beloved classic. Just 3 ingredients and 10 minutes is all it takes for this party favourite. It's a nice easy one for an extra special lunchbox treat too.
Another delicious treat is our Classic Milo Cookies.
Quick look at Mars Bar Slice
- ⏲️ 10 mins (plus a little chilling time)
- 🛒 Ingredients: Just 3!
- 🍽️ Makes: 24 squares.
- 🧑🍳 Difficulty: Super easy. Supervision required for heating.
- 🗃️ Make ahead: Keep for up to a week.
My sister made Mars Bar slice for dessert one night years ago and it was a big hit from that night on.
She just informed me that she first made it in grade three so she was just 8 years old.
Why Make This Mars Bar Slice
- It's so easy an 8 year old can make it.
- In the words of my daughter 'it's so so delicious.'
- It's super quick to whip up.
- It's a sweet treat with just 80 calories per serve.
If you love a good chocolate slice/bar then make sure you also check out our recipe for salted crunchie nut bars.
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Recipe Ingredients
There are just 3 ingredients in this delicious slice.
- Mars bars
- Butter - the pure stuff that comes in a block
- Rice bubbles - or puffed brown rice
How to Make Mars Bar Slice
Step 1 - Line a 20cm square baking tin with baking paper (alternatively use plastic wrap).
Step 2 - Start the slice by breaking up the Mars Bars into a saucepan along with the butter.
Step 3 - Heat it over medium heat, stirring until it is all melted.
Step 4 - Remove the melted mixture from the stove.
Step 5 - Take the saucepan off the heat and stir through the rice bubbles until they are all coated in chocolatey goodness.
Step 6 - Spread the mixture into the prepared baking tray and refrigerate until set (about 2 hours).
Step 7 - Lift the slice out of the tin once it has set.
Step 8 - Use a sharp knife to slice it up into squares. Store the slice in an airtight container the fridge for up to a week or freeze for up to two months.
Mars Bar Slice Variations
- Double Chocolate Mars Bar Slice: Add ½ cup of dark chocolate chips to the mixture for an extra chocolatey treat or drizzle the finished bar with extra melted dark chocolate.
- Nutty Mars Bar Slice: Mix in ½ cup of chopped peanuts or slivered almonds for added crunch.
Recipe FAQs
Yes you absolutely could use a microwave to melt the mars bars and butter together. Just heat them for 30 seconds at a time, stirring between each one.
Use a regular size Mars Bar (about 50g).
You sure could. It would be super chocolatey.
We haven't tried it but I think it would work rather nicely.
Claire Tip
Get the kids to make it! This Mars Bar slice was always the first thing to disappear from the party table when I was a kid after that first time my sister made it. Now my kids make it – it’s simple enough for them to make themselves (with a bit of guidance melting the bars).
Recipe
Mars Bar slice
Ingredients
- 50 g 2oz butter
- 4 Mars Bars 52g
- 3 cups Rice Bubbles
Instructions
- Break the Mars Bars up and place them together with the butter in a saucepan. Heat it over medium heat until it has all melted together. Remove the pan from the heat and stir in the rice bubbles until they are all coated.
- Spread the mixture into a lined tin and drizzle with melted chocolate.
- Refrigerate for at least one hour then remove and cut into squares. Store it in the fridge.
Notes
Mars Bar Slice Variations
- Double Chocolate Mars Bar Slice: Add ½ cup of dark chocolate chips to the mixture for an extra chocolatey treat or drizzle the finished bar with extra melted dark chocolate.
- Nutty Mars Bar Slice: Mix in ½ cup of chopped peanuts or slivered almonds for added crunch.
Claire Cameron says
Such a simple and delicious sweet treat!
Nic@diningwithastud says
A great recipe for the kids to make and adults to eat ;) LOVE MBS!!!
Claire says
MBS... I love it!
Barbara @ Barbara Bakes says
The chocolate on top is a great idea. So much prettier.
Claire says
Thanks Barbara. Much tastier too!
The Café Sucré Farine says
What a fun, simple delicious sounding recipe to have in your recipe box!
Claire says
It's so simple and quick. Great for kids too.
Hotly Spiced says
I love Mars Bar Slice. So easy to make and such an indulgence. Would love a slice right now.
Claire says
It's a little too easy really!
Lorraine @ Not Quite Nigella says
I had no idea that it would be quite low in calories! Another reason to make it! :) I just assumed that it would be really high in calories because it had Mars Bar in the name !
Claire says
It's all the rice bubbles that fill it out and lower the calories. Not a bad way to enjoy a Mars Bar I must say.