Thermomix Hedgehog Slice

Hedgehog Slice was always one of my favourite treats when I was growing up and I couldn’t believe that I had not yet made a Thermomix version of this classic slice recipe!


This Thermomix Hedgehog Slice is dangerously easy to put together and I guarantee you will not be able to stop at just one piece!  It’s a little bit different to the classic Hedgehog Slice recipe as it uses condensed milk and doesn’t contain walnuts, however that doesn’t stop you from adding them if you like!

If you love this recipe, remember to also check out our Chocolate Brownies recipe here. Guaranteed satisfaction!

Thermomix Hedgehog Slice

We love this traditional Thermomix Hedgehog Slice!
4.75 from 4 votes
Print Pin Rate
Course: Slices
Prep Time: 10 minutes
Cook Time: 4 hours
Total Time: 4 hours 10 minutes
Servings: 24
Author: Thermomix Recipes by Thermobliss


  • 2 packets of plain biscuits - Marie or similar
  • 250 g of butter
  • 3 tablespoons of cocoa
  • 4 tablespoons of shredded coconut
  • 1 tin of condensed milk
  • 200 g of milk chocolate


  • Line a 20cm x 20cm square cake tin with baking paper, making sure you leave plenty hanging over the edges to help you remove the slice once it’s set.
  • Place one pack of the plain biscuits into your Thermomix Bowl and crush for 3 seconds on speed 4. Add the second pack and crush for a further 3 seconds on speed 4 - use your spatular/ wooden spoon to roughly break up any large biscuits and pour into a separate bowl and set aside until needed.
  • Pour the condensed milk into your Thermomix Bowl and add the butter (3cm pieces) and cocoa. Cook for 2 minutes on 60 degrees speed 1 or until the butter has completely melted.
  • Add the biscuits and shredded coconut to your Thermomix Bowl and mix for 10 seconds on speed 4 REVERSE or until the mixture has combined.
  • Pour the mixture into your prepared slice tin and flatten the surface with the back of a metal spoon.
  • Clean your Thermomix Bowl and make sure it’s completely DRY before adding the chocolate pieces. Cook for 2 minutes on 50 degrees speed 3 or until the chocolate has completely melted.
  • Pour melted chocolate over the top of your slice and place it in the fridge for 4 hours or until set.

If you prefer, you can melt the chocolate in the microwave. I like to cook it for 30 second spurts at a time, stirring well each time.  By using a 20cm x 20cm tin your slice will be quite high (as pictured), if you prefer a smaller slice, simply use a larger tin.

Thermomix Hedgehog Slice

What’s your favourite classic slice recipe?


Comments 23

  1. Yahoo, am pinning this one now! Here in Canada we call this type of treat “bars” not “slice” and one of the most popular is the “Nanaimo Bar”… too sweet for me, but sure is yummy! keep on mixing 🙂

  2. Post

    Isn’t is funny how we all know recipes by different names? I will have to check out the Nanaimo Bar – I’m intrigued!

  3. The biscuit is always over ‘smashed’ when I blend it with the chocolate mix, even when using reverse, so there aren’t any biscuit pieces left. Is this common or just me?

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  4. Hands down the best hedgehog slice ever!

    Thermobliss is the best Thermomix recipe website! All the recipes are so easy to use.

    Can not recommend enough 🙂

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  5. Thanks so much. Made this for my 3 year old’s party and it was a big hit with kids and parents alike. Can this one be frozen please?

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  6. Pingback: Thermomix Chocolate Slice - Thermobliss

  7. 5 stars
    I made this recently for the Australia’s biggest Morning Tea function at my church to raise money for Cancer Research and it was voted most popular slice! All credit to Thermombliss. Thank you!

  8. 4 stars
    Gorgeous slice and easy to make. Similar to another person who commented, found it difficult to get the biscuits the right consistency. The thermomix either wants to make crumbs or leave in big pieces.

    1. Hi Robyn, yes the Thermie can be tricky with biscuit sizes! If you’d like them a bit more uniform, then I’d try cutting them instead. xx

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