Mars Bar Slice

squares of mars bar slice stacked on plate

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4.83 from 41 votes

A tried, tested and perfected recipe for this 5-ingredient, no-bake slice that everyone loves.

Prep Time20

Cook Time0

Total Time20

Course: Dessert

Cuisine: Australian

Keyword: mars bar slice

Servings: slices

Calories: 87kcal

Equipment

slice tin (around 27 x 17cm)
mixing bowl and spoon
small whisk
small heatproof bowl and spoon
saucepan

Ingredients

4 Mars bars (53 gram bars) (that's 4 ½ of the new 47 gram bars)
3 cups rice bubbles (100 grams)
60 grams butter
2 teaspoons golden syrup
240 grams milk chocolate (you can get away with 180 grams, which is one family block of Cadbury's, but the extra 60 grams is ideal)

Instructions

Grease a slice tin (around 27 x 17cm) with butter and then line with baking paper, leaving extra on each side (to pull the slice from the tin once cooked).
Measure rice bubbles into a large mixing bowl.
Break mars bars into pieces with your hands and put into a saucepan. Add butter and golden syrup.
Place saucepan on low heat while stirring to combine.
Keep stirring until the mixture reaches a smooth, runny consistency. Use a whisk to stir the mixture towards the end of the process to help get that completely smooth consistency. The mixture should resemble melted chocolate, with no lumps.
Add mixture to rice bubbles and stir quickly to combine.
Spread out mixture in the slice tin, spreading evenly to the edges and then pressing into the tin firmly with the back of a metal spoon.
Melt chocolate in the microwave using 20 second bursts. (check and stir after each burst).
Pour melted chocolate over the slice and angle tin from edge to edge to help chocolate reach each side and corner of the slice tin.
Place in fridge for 15-30 minutes. Ideally, the chocolate shouldn't be completely set when cutting (it will crack as you're cutting if it's too hard). Alternatively, if you've left the slice in the fridge for longer just let the slice rest at room temperature for at least 20 minutes before cutting into squares.
Remove slice from tin by lifting edges of baking paper, cut into squares and return to the fridge.

Video

Notes

Storing:

This slice is best stored in the fridge, especially during the summer months. However it is okay at room temperature for a while if you're planning to take it to a party to share, for example. It will last at least a couple of weeks stored in an airtight container in the fridge.

Freezing:

It should be okay for a month or two in the freezer if wrapped or placed in an airtight container. Remove from the freezer and allow to defrost before consuming.

Nutrition:

The nutrition information is an automatically generated estimate and is not guaranteed to be accurate.

Tips:

Read the entire post and recipe card for all the tips and hints. This is an easy recipe, but there are a few tips and tricks to get a perfect result.
The most important part of the process is heating the mars bars, syrup and butter gently and then whisking the mixture over the low heat to get a smooth texture. Make sure the temperature remains low.
Another tip for perfect Mars Bar Slice: make sure you use fresh, good quality ingredients.
Can you replace the golden syrup? Yes, with maple syrup, honey or corn syrup. You can also simply omit it.
Make it festive by adding some red and green M & Ms or festive-themed sprinkles.

Nutrition