Easy Thermomix Jelly Slice Recipe

Jelly Slice Recipe by Thermobliss

Hands up who loves Jelly Slice!  I’ve tried a couple of versions, but ALWAYS seem to come back to this easy Thermomix Jelly Slice recipe!

Easy Thermomix Jelly Slice Recipe

Jelly Slice is such a classic slice recipe and my Mum has been making this slice for special occasions for as long as I can remember.  The key to making this easy Thermomix Jelly Slice recipe is to make sure you let each layer chill in the fridge and bring the jelly to room temperature before adding it to the slice, otherwise you may end up with a bit of a melted mess.

Easy Thermomix Jelly Slice Recipe

Easy Thermomix Jelly Slice Recipe

Easy Thermomix Jelly Slice

4.5 from 2 votes
Print Pin Rate
Course: Slices
Prep Time: 1 hour
Cook Time: 4 hours
Total Time: 5 hours
Servings: 24
Author: Lauren


  • 200 g of Marie biscuits - or any other plain biscuit
  • 225 g of melted butter
  • 395 g can of condensed milk
  • teaspoons of gelatine
  • ¾ cup of boiling water
  • 2 Lemons – juiced
  • 1 packet to strawberry jelly
  • Boiling Water as per jelly packet instructions
  • An extra 1 teaspoon of gelatine – for the jelly top


  • Line the base and the sides of a slice tin with baking paper, making sure you leave plenty hanging over the sides.
  • Place the biscuits in the bowl and crush for 5 seconds on speed 9.
  • Add the butter and heat for 3 minutes on 80 degrees speed 2.
  • Remove biscuit mixture from the bowl and pour into the lined tray. Push the mixture down with a metal spoon to create a flat surface. Place in the fridge for 30 minutes to set.
  • To make the filling, combine the gelatine in a jug with the boiling water and allow to cool slightly. In a clean bowl, add the lemon juice and condensed milk and mix for 45 seconds on speed 4. After 5 seconds, remove the measuring cup and carefully pour the gelatine mixture in. Remove the set slice base from the fridge and pour over the filling. Put back into the fridge for 30 minutes.
  • In a clean Thermomix bowl, add the hot water and heat for 3 minutes on 90 degrees speed 2.
  • Add the jelly crystals and one extra teaspoon of gelatine and stir until they have dissolved. Pour jelly into another bowl and allow it to cool until it has reached room temperature.
  • Remove the slice from the fridge and carefully pour the jelly over the slice and place it back in the fridge to set for approximately 4 hours - overnight is best.
  • Remove the set slice from the fridge and cut into squares.

Easy Thermomix Jelly Slice Recipe

What’s your favourite classic slice recipe?

Comments 6

  1. Heyyyy Thermobliss…….what a delightfully delicious little treat this is!!
    I think your page may receive some traffic after I posted up a few pics yesterday showing how awesome and easy this yummy morsel is to make!!
    Great work!!!

    Cheers 🍻
    Chris Jolly 👍

  2. Question for all you Jelly Slice lovers; can it be frozen? Doing school lunchbox mega cook to stock the freezer for the term and would love to include this. Thanks in advance.

    1. Post
  3. This looks delicious – just wondering if I can double the recipe? I have a larger than normal slice tin so want to make sure the layers are nice and thick!

    1. Post

      Hi Shari, I haven’t actually tried to double this recipe before I’m afraid. I normally use a 28 x 18cm slice tin and it does make a big thick slice in that one if that helps 🙂

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