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    Home » All Posts » Sweet » Slices, Brownies & Bars » Thermomix Hedgehog Slice

    Published: May 28, 2015 · Modified: Nov 15, 2021 by Lauren Matheson ·

    Thermomix Hedgehog Slice

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    Jump to Recipe Print Recipe

    Our old fashioned Thermomix Hedgehog Slice has the perfect combination of chocolate, biscuits and sweetened condensed milk. A no-bake recipe that takes just 10 minutes to prepare.

    Pieces of hedgehog slice on a white stand.

    This Thermomix Hedgehog Slice is by far one of our most popular slice recipes - along with our Clinkers Slice, Jelly Slice and Weet-Bix Slice.

    Not only is this recipe quick and easy to prepare, it's a guaranteed hit with the kids (and adults too!).

    Why You're Going To Love This Recipe

    What's not to love about a big batch of homemade Thermomix Hedgehog Slice!?

    • No-Bake - Forget about turning the oven on... this no-bake recipe requires no cooking at all!
    • Feeds A Crowd - Our Thermomix Hedgehog Slice serves 24 making it the perfect option for parties, bake sales, lunchboxes and more.
    • Nut Free - Unlike many hedgehog slice recipes, ours is completely NUT-FREE making it a great option for school lunchboxes. Of course, if you're not catering for nut-free allergies or school food regulations, you can always go ahead and add some chopped walnuts if you like.
    • Basic Ingredients - This entire slice is made from 6 budget friendly pantry and fridge staples. In fact, you might find that you already have all of the ingredients at home.
    • 5 Star Recipe - Our readers love this recipe. Try it for yourself and see why it's so popular.
    Hedgehog pieces on a white cake stand.

    What You Need

    Just 6 ingredients are needed to make Thermomix Hedgehog Slice!

    The ingredients for Thermomix Hedgehog Slice.
    • Biscuits - also known as cookies in the US. I generally use Arnott's Marie biscuits, but you can use any plain sweet biscuit variety you like.
    • Sweetened Condensed Milk - choose full fat (not skim or light) sweetened condensed milk as it sets firmer. I like to use Nestle brand as I find it gives a better result than the home brand options.
    • Butter - use either salted or unsalted butter.
    • Cocoa Powder - choose unsweetened cocoa powder.
    • Coconut - choose desiccated coconut which is a fine, dry coconut.
    • Chocolate - you can use any type of chocolate for melting over the top of the slice. I generally use milk chocolate, but you can replace it with white or dark chocolate if you prefer.

    Step By Step Instructions

    It couldn't be easier to make Thermomix Hedgehog Slice!

    Step 1 - Crush The Biscuits

    Place half of the biscuits into the Thermomix and chop.

    Biscuits in a Thermomix bowl,

    Add the remaining biscuits and chop again.

    Biscuits in a Thermomix bowl.
    Crushed biscuits in a Thermomix bowl.

    TIP: Adding half of the biscuits at a time will give you the perfect balance of some finely crushed biscuits and some larger chunks.

    Set the biscuits aside in a seperate bowl.

    Step 2 - Melt

    Melt the sweetened condensed milk and butter until smooth and no lumps remain.

    Butter and sweetened condensed milk in a Thermomix.
    Sweetened condensed milk in a stainless jug.

    Step 3 - Mix

    Add the biscuits, coconut and cocoa powder and mix until combined.

    Cocoa, coconut and sweetened condensed milk in a Thermomix.

    TIP: You will need to use the spatula through the MC hole to help mix the slice mixture together.

    Press into a prepared baking tin and set aside while you melt the chocolate.

    Hedgehog mixture in a stainless jug.
    Hedgehog pressed into a baking tin.

    Step 4 - Melt The Chocolate

    Place the chocolate into a clean and dry Thermomix bowl. Melt until smooth.

    Pour the melted chocolate over the slice base and chill for 4 hours.

    Chocolate coated slice in a baking tin.

    Expert Tips & FAQ

    What size baking tin should I use?

    For a hedgehog slice that sits high, grease and line a 20X20cm baking tin.
    For a flatter hedgehog slice, grease and line an 18X28cm slice tin.
    I used a 20X20cm tin for the slice in these photos.

    Is it ok to still have chunks of biscuits in the mixture?

    Yes! You'll find that the majority of the biscuits will end up finely crushed while you will have some larger chunks remaining. If the chunks are very large, simply use the spatula to chop them into smaller pieces.

    Storing

    Store the Thermomix hedgehog slice in an airtight container in the fridge for up to 5 days.

    Freezing

    Alternatively, this slice can be frozen for up to 3 months. Allow to defrost before consuming.

    Chocolate hedgehog pieces on a white cake stand.

    Related Recipes

    We absolutely love baking slices... here's a few more of our most popular slice recipes:

    • Chunks of rocky road on a chopping board.
      Thermomix Clinkers Rocky Road
    • A close up of a square of slice made with rolled oats and dates, and drizzled with dark chocolate.
      Thermomix Date Slice
    • Crunchy honey almond slice.
      Thermomix Honey Almond Slice

    Thermomix Slices Cookbook

    Our Thermomix Slices Cookbook is packed full of 31 delicious baked and no-bake slice recipes.

    Click here to shop our Thermomix Slices Cookbook

    Thermomix Slices Cookbook
    A hand grabbing a piece of hedgehog.
    Pieces of hedgehog slice on a white stand.

    Thermomix Hedgehog Slice

    We love this traditional Thermomix Hedgehog Slice packed full of chocolate, biscuits and sweetened condensed milk!!
    4.91 from 11 votes
    Print Pin Rate
    Course: Slices
    Cuisine: Western
    Prep Time: 10 minutes minutes
    Chilling Time: 4 hours hours
    Total Time: 4 hours hours 10 minutes minutes
    Servings: 24 serves
    Calories: 175kcal
    Author: Lucy & Lauren
    Cost: $10

    Equipment

    • Thermomix

    Ingredients

    • 500 g Arnott's Marie biscuits or any plain sweet biscuits
    • 395 g sweetened condensed milk full fat (not skim or light)
    • 250 g butter
    • 25 g coconut shredded or desiccated
    • 20 g cocoa powder
    • 250 g milk chocolate

    Instructions

    • 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 250g of plain biscuits into your Thermomix Bowl and crush for 3 seconds, Speed 4. Add the remaining 250g and mix for a further 5 seconds, Speed 4. Note: use your spatula/ wooden spoon to roughly break up any remaining large biscuits. Pour the biscuits into a separate bowl and set aside until needed.
    • Pour the sweetened condensed milk into your Thermomix Bowl and add the butter (cut into 3cm pieces). Cook for 2 minutes, 60 degrees, Speed 1, or until the butter has completely melted.
    • Add the biscuits, coconut and cocoa powder to your Thermomix Bowl and mix for 10 seconds, Speed 4, REVERSE, or until the mixture has completely 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 milk chocolate. Cook for 3 minutes, 50 degrees, Speed 2, or until the chocolate has completely melted.
    • Pour the melted chocolate over the top of your slice and place into the fridge for 4 hours or until set.

    Notes

    RECIPE NOTES & TIPS
    • Biscuits - also known as cookies in the US. I generally use Arnotts Marie biscuits, but you can use any plain sweet biscuit variety you like.
    • Sweetened Condensed Milk - choose full fat (not skim or light) sweetened condensed milk as it sets firmer. I like to use Nestle brand as I find it gives a better result than the home brand options.
    • Store the Thermomix hedgehog slice in an airtight container in the fridge for up to 5 days.
    • Freeze - in an airtight container for up to 3 months. Allow to defrost before consuming.

    Nutrition

    Calories: 175kcal | Carbohydrates: 15g | Protein: 2g | Fat: 13g | Saturated Fat: 8g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 4g | Trans Fat: 1g | Cholesterol: 28mg | Sodium: 97mg | Potassium: 104mg | Fiber: 1g | Sugar: 13g | Vitamin A: 304IU | Vitamin C: 1mg | Calcium: 52mg | Iron: 1mg
    Tried this Recipe? Share it Today!Mention @Thermobliss or tag #Thermobliss!

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    « Thermomix Pecan & Maple Slice
    Thermomix Jam and Coconut Slice »

    Reader Interactions

    Comments

    1. Lillian says

      June 08, 2021 at 7:58 am

      What could you use instead of chocolate gives me migraines

      Reply
    2. Robyn Bishop says

      July 27, 2020 at 11:16 am

      5 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.

      Reply
      • Lucy says

        July 27, 2020 at 1:49 pm

        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

        Reply
    3. Caroline says

      May 23, 2020 at 2:43 pm

      5 stars
      Great and easy recipe. Everyone loved it!

      Reply
      • Lucy says

        May 24, 2020 at 10:31 am

        Fantastic!

        Reply
    4. Tania says

      October 06, 2019 at 2:46 pm

      How long will this keep for?

      Reply
      • Lucy says

        October 06, 2019 at 7:21 pm

        Approximately 5 days in an airtight container or 1-2 months in the freezer.

        Reply
    5. Kerrie says

      June 06, 2019 at 12:14 pm

      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!

      Reply
      • Lucy Mathieson says

        June 07, 2019 at 9:37 am

        Yippppeee!!! That's so awesome!!

        Reply
    6. Loren says

      August 19, 2018 at 1:14 pm

      Have already made this multiple times, and always goes too quickly!! Soo yum 🙂

      Reply
      • Lucy Mathieson says

        August 20, 2018 at 5:35 am

        Hehehe it sure does!

        Reply
    7. Cassidy says

      April 16, 2018 at 9:05 am

      Very delish! I used Cadbury old gold almonds chocolate on top ?

      Reply
      • Lucy Mathieson says

        April 16, 2018 at 9:07 am

        YUM!!!!

        Reply
    8. Jane says

      February 02, 2017 at 3:46 pm

      Could I use dark chocolate?

      Reply
      • Lucy says

        February 03, 2017 at 4:31 am

        Absolutely!!!

        Reply
    9. Jussi says

      November 20, 2016 at 6:32 pm

      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?

      Reply
      • Lauren says

        November 21, 2016 at 6:23 am

        Oh that's great! This can't be frozen I'm sorry, the chocolate goes a little funny.

        Reply
    10. Rachel Hill says

      August 30, 2016 at 4:47 pm

      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 🙂

      Reply
      • Lauren says

        August 31, 2016 at 7:17 pm

        Oh thank you so much Rachel, you are too lovely xx

        Reply
    11. Lesley says

      October 25, 2015 at 6:44 pm

      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?

      Reply
      • Lauren says

        October 26, 2015 at 7:21 am

        Hi Lesley, Maybe you could try mixing the biscuits on a lower speed? I hope this helps 🙂

        Reply
    12. Lauren says

      June 11, 2015 at 12:27 pm

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

      Reply
    13. Helene Meurer says

      May 29, 2015 at 4:00 am

      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 🙂

      Reply

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    Hi, We're Lauren and Lucy! We're two mums who love to cook and want to show you how easy it is to make delicious family meals, baking treats and lunch box snacks in your Thermomix..

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