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Side view of two pieces of no bake peppermint slice on a marble tray
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4.91 from 22 votes

The Best No Bake Peppermint Slice Recipe

This easy no bake Peppermint Slice takes no time at all to make and is perfect for cake stalls, parties and is a great after dinner mint too! Both regular and Thermomix instructions included.
Prep Time15 mins
Total Time2 hrs 15 mins
Course: Desserts
Cuisine: Australian
Keyword: No Bake Slice, Peppermint Slice, Thermomix Slice Recipes
Servings: 24 pieces
Calories: 229kcal


  • 1 28 x 18cm slice tin


  • 100 grams butter
  • 200 grams sweetened condensed milk
  • 180 grams peppermint chocolate
  • 250 grams plain biscuits Marie Biscuits or similar
  • 400 grams of white chocolate 2 blocks
  • 4 peppermint crisp bars


  • Line a 28 x 18 cm slice tin with baking paper, making sure that you leave plenty hanging over the sides to help your remove the slice once it has set.
  • Crush the biscuits either by using a food processor or a rolling pin until they resemble fine crumbs. Transfer to a large bowl.
  • Roughly chop ALL of the peppermint crisp bars and add HALF of the chopped pieces to the bowl with the biscuit crumbs. Set the remaining pieces aside for later.
  • Break the peppermint chocolate into squares and place it along with the butter (which has been cut into cubes) into a microwave safe bowl and cook for 30 second spurts on a medium high heat until melted.
  • Add the melted chocolate mixture and the condensed milk to the bowl with the crushed biscuits and use a large spoon to mix to combine.
  • Pour the mixture into the slice tin, and use the back of your metal spoon to press it down into the tray, creating a flat surface.
  • Break the white chocolate into squares and place into a microwave safe bowl. Cook for 30 second spurts until melted and then pour over the peppermint slice and top with the remaining peppermint crisp pieces.
  • Place the slice into the fridge to set, and after approximately 2 hours, remove and cut into small slices

Thermomix Instructions

  • Line a 28 x 18 cm slice tin with baking paper, making sure that you leave plenty hanging over the sides to help your remove the slice once it has set.
  • Place the biscuits into your Thermomix bowl and use the 1 sec Turbo function to crush until they are broken up into approximately 2 – 3cm pieces. Transfer to a separate bowl and set aside until needed.
  • Break the Peppermint Crisp Bars in half and place into your Thermomix bowl, blitz for 2 seconds, speed 4 to break into small pieces. Set aside in a separate bowl until needed.
  • Without washing the Thermomix bowl, add the butter (cut into cubes), condensed milk and peppermint chocolate which has been broken into squares and cook for 3 minutes, 60 degrees, speed 3. If it’s not quite combined at the end of the cooking time (time taken will depend on temperature of the ingredients), cook for a further 1 minute, 60 degrees, speed 3.
  • Add the biscuits and HALF of your peppermint crisp pieces to your Thermomix bowl and mix for 20 seconds, speed 2 REVERSE or until combined.
  • Pour the mixture into your prepared tin (it will be a little sticky) and use a metal spoon to spread and flatten the surface.
  • Place the white chocolate into a CLEAN Thermomix bowl and cook for 3 minutes, 50 degrees, speed 2 before scraping down the sides and cooking for a further 1 minutes, 50 degrees, speed 2 or until melted.
  • Pour the melted white chocolate over the top of your slice and use the remaining peppermint crisp pieces to decorate it. Place it into the fridge for a minimum of 2 hours to set before cutting into small pieces.


  • I suggest using full fat sweetened condensed milk for this recipe as it will help the slice hold together better.
  • You can use any type of plain biscuits for this recipe.
  • This slice is best stored in an airtight container and will keep in the fridge for up to seven days.
  • Your slice mixture will be sticky when you mix all of the ingredients together - this is normal.


Serving: 0g | Calories: 229kcal | Carbohydrates: 33g | Protein: 3g | Fat: 10g | Saturated Fat: 6g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 3g | Cholesterol: 7mg | Sodium: 83mg | Potassium: 128mg | Fiber: 1g | Sugar: 26g | Vitamin A: 35IU | Vitamin C: 1mg | Calcium: 67mg | Iron: 1mg