Mars Bar Slice | Best Ever Recipe

Everyone’s favourite no-bake Mars Bar Slice recipe couldn’t be easier to make… with just 5 ingredients and 10 minutes prep time. 

A plate of Mars Bar Slice

In our list of the top 5 most popular no-bake slice recipes, Mars Bar Slice is right up there – along with Lemon & Coconut Slice, Jelly Slice, Clinkers Slice and Peppermint Slice

 

Mars Bar Slice Recipe

With it’s sweet and crunchy chocolate rice bubble base and milk chocolate topping, it doesn’t get any more delicious than this 10 minute recipe. 

Pieces of rice bubble Mars Bar slice on a plate.

Ingredients for Mars Bar Slice

All you need is just 5 ingredients: 

  • butter
  • Mars Bars
  • rice bubbles (or any puffed rice)
  • golden syrup (see below for substitutes)
  • milk chocolate
  • optional – coconut oil or vegetable oil

*Please scroll to the recipe card at the bottom of the post for ingredient quantities and the method

The ingredients for Mars Bar Slice

How To Make Mars Bar Slice

Step 1 – Melt the Mars Bars, butter and golden syrup in the microwave

Chopped Mars Bars, butter and golden syrup in a bowl.

Melted Mars Bars, butter and golden syrup.

Step 2 – Stir through the rice bubbles and additional chopped Mars Bar pieces

Rice bubbles and Mars Bars in a bowl.

Mars Bar Slice mixture in a bowl.

Step 3 – Press firmly into a rectangular baking tin and place into the fridge

Mars Bar and chocolate rice bubbles mixture pressed into a slice pan.

Step 4 – Pour melted milk chocolate over the cooled slice

Melted milk chocolate being poured on top of a chocolate rice bubble base.

Step 5 – Refrigerate until set

Melted chocolate spread over a no-bake refrigerator slice.

Tips For Making Mars Bar Slice

  • You can melt the butter, golden syrup and Mars Bars in the microwave, on the stove-top or in a Thermomix.
  • The Mars Bars will not melt completely but will still in small chunks – this is fine. 
  • Press the mixture firmly into a greased and lined baking tin. The mixture needs to be pressed down very firmly so that it doesn’t break apart you you cut it.
  • Adding coconut oil or vegetable oil to the milk chocolate will help it to stop from cracking when sliced. 
  • Leave in the fridge to set for a minimum of 3-4 hours (overnight is best). 
  • Take the slice out of the fridge 30 minutes before cutting to allow the chocolate to soften slightly. 
  • Use a small serrated knife to cut through the chocolate layer and then through the rice bubbles layer. 

Pieces of chocolate slice made with Mars Bars and rice bubbles and topped with milk chocolate.

Storing Mars Bar Slice

Mars Bar Slice can be stored in an airtight container in the fridge for up to 1 week. It can also be frozen for up to 1 month. 

 

More Mars Bar Recipes

If you love Mars Bars (and who doesn’t!), check out these delicious recipes:

 

FAQ

What can I substitute the golden syrup for?

You can replace the golden syrup with corn syrup, honey or maple syrup. 

What are Mars Bars?

Mars Bars are a nougat and caramel bar covered in chocolate. They are made by Mars can be purchased from any supermarket. 

How can I stop my slice from cracking and breaking when I cut it?

Make sure the mixture has been very firmly pressed into the tin. Leave it to set in the fridge for a minimum of 3-4 hours (but overnight is best). Take the slice out of the fridge for 30 minutes before cutting. Use a small serrated knife to gently cut through the chocolate layer. Adding coconut oil or vegetable oil to the melted chocolate will also prevent cracking. 

Can I make Mars Bar Slice in my Thermomix?

Absolutely – refer to the recipe card below for the conventional and Thermomix methods. 

 

For more easy slice recipes, check out our NO-BAKE BARS & SLICES EBOOK packed with 17 of our most popular recipes (available in both conventional and Thermomix versions) for just $10.00.

Get the eBook via instant download and then save to your computer, tablet, phone or iBooks. If you’d prefer a hard copy, all of our eBooks print to an easy-to-read A4 size.

Shop the conventional version here or the Thermomix version here

No-Bake Slices eBook

 

VIDEO: HOW TO MAKE MARS BAR SLICE

 

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Mars Bar Slice

Mars Bar Slice

Everyone's favourite no-bake Mars Bar Slice recipe couldn't be easier to make... with just 5 ingredients and 10 minutes prep time.
5 from 3 votes
Print Pin Rate
Course: sweet
Cuisine: Slices
Keyword: mars bar slice
Prep Time: 10 minutes
Chilling time: 4 hours
Total Time: 4 hours 10 minutes
Servings: 20 serves
Calories: 151kcal

Ingredients

  • 75 g butter
  • 150 g Mars Bars chopped
  • 1 tbs golden syrup
  • 3 cups (90g) rice bubbles or any puffed rice
  • 250 g milk chocolate
  • 20 g coconut oil or vegetable oil (optional)

Instructions

Conventional Method

  • Grease and line a 18X22cm rectangular slice tin with baking paper and set aside. 
  • Melt the butter, 100g of the Mars Bars and golden syrup on low heat in a saucepan (or in 30 second bursts in the microwave on 50% power). Please note: the Mars Bars will not completely melt. Mix until the butter and golden syrup are smooth.
  • Stir through the rice bubbles and the third Mars Bar (chopped).
  • Press mixture very firmly into the prepared tin. 
  • Place milk chocolate and coconut oil/vegetable oil in a heatproof bowl. Microwave on medium for 3 minutes, 50% power, or until just melted, stirring every 30 seconds with a metal spoon. Stir until smooth.
  • Spread over slice and refrigerate until firm (a minimum of 3-4 hours - or best overnight).
  • Remove slice from the refrigerator about 30 minutes before cutting into squares with a warm knife.

Thermomix Method

  • Grease and line a 18X22cm rectangular slice tin with baking paper and set aside. 
  • Place 100g of the chopped Mars Bars, butter and golden syrup into the Thermomix bowl. Melt on 60 degrees, Speed 2 for 3 minutes.
  • Add the rice bubbles and the remaining Mars Bar. Mix on Reverse, Speed 2, 15 seconds or until completely combined.
  • Press the mixture very firmly into the prepared tin.
  • Place the milk chocolate into a clean TM bowl. Melt on 50 degrees, Speed 3 for 2-3 minutes (scraping down the sides of the bowl occasionally).
  • Spread over slice and refrigerate until firm (a minimum of 3-4 hours - or best overnight).
  • Remove slice from the refrigerator about 30 minutes before cutting into squares with a warm knife.

Notes

Recipe Notes
Melting the butter, golden syrup and Mars Bars - you can melt the ingredients in the microwave, on the stove-top or in a Thermomix. Note: The Mars Bars will not melt completely but will still in small chunks – this is fine. 
Press the mixture VERY firmly into a greased and lined baking tin - The mixture needs to be pressed down very firmly so that it doesn’t break apart you you cut it.
Adding coconut oil or vegetable oil to the milk chocolate - will help it to stop from cracking when sliced. 
Setting time - Leave in the fridge to set for a minimum of 3-4 hours (overnight is best). 
Cutting the slice - Take the slice out of the fridge 30 minutes before cutting to allow the chocolate to soften slightly. Use a small serrated knife to cut through the chocolate layer and then through the rice bubbles layer. 
Storing the slice - Mars Bar Slice can be stored in an airtight container in the fridge for up to 1 week. It can also be frozen for up to 1 month. 
Golden syrup substitutions - You can replace the golden syrup with corn syrup, honey or maple syrup. 
 

Nutrition

Calories: 151kcal | Carbohydrates: 15g | Protein: 1g | Fat: 11g | Saturated Fat: 7g | Cholesterol: 8mg | Sodium: 30mg | Potassium: 61mg | Fiber: 1g | Sugar: 11g | Vitamin A: 95IU | Calcium: 6mg | Iron: 0.6mg
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48 thoughts on “Mars Bar Slice | Best Ever Recipe”

  1. Julia says:

    How long will this keep in the fridge?

    1. Lucy says:

      Hi Julia, up to 1 week xx

  2. Carmel McArthur says:

    Can I use dark chocolate instead of milk chocolate for the topping? Thank you

  3. Susan says:

    Look delicious! Would it be gluten free?

    1. Lucy says:

      Hi there, you would need to use gluten-free puffed rice xx

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