Homemade LCM Bars in the Thermomix


I know I’ve been sharing a lot of lunchbox recipes lately but I’m really trying to give my children some variety so I’m trying out lots of ideas. These homemade LCM bars have been a huge success. They’re so quick and easy to make I know I will never buy the commercial variety again.

Thermomix LCM Bars

Thermomix LCM Bars

LCM Bar with Smarties

Thermomix LCM Bars

Julie Carlyle
A quick and easy alternative to the commercially prepared LCM bar.
5 from 5 votes
Prep Time 10 mins
Total Time 10 mins
Course Snack
Cuisine Australian
Servings 12 bars
Calories 150 kcal


  • 5 cups rice bubbles
  • 100 gm butter
  • 200 gm pink and white marshamllows
  • 1 tsp vanilla paste
  • 50 gm white chocolate
  • 2 Tbs coloured chocolate buttons


  • Prepare a slice tin with baking paper.
  • Place butter, marshmallow and vanilla in TM bowl. Melt 5 min/90 degrees/Speed 2.
  • Add rice bubbles to the marshmallow. Combine 30 sec/Speed 2 (Reverse blade)
  • Pour the marshmallow mixture into the prepared slice tray. Flatten the slice down with a plastic spatula.
  • Melt the chocolate in a microwave for 50 sec. Stir then heat again for 20 seconds.
  • Drizzle the LCM slice with white chocolate and top with the colour chocolate buttons. 
  • Refrigerate 2-3 hours or until set.
  •  Slice into bars.


Keep LCM bars refrigerated until required.


Calories: 150kcal
Tried this recipe?Let us know how it was!
Marshmallow Rice Bubble Slice LR

Marshmallow Rice Bubble Slice LR

When my daughter tried the bars she said they were exactly the same as the bought LCM’s. I like to use salted butter and vanilla as you get that delicious “sweet and salty” flavour. I decorated these bars with melted chocolate and mini smarties so they’re not exactly a health food. On a positive note,  at least I know what ingredients are in them. Next time I make these I’m going to vary the ingredients and add some nuts and dried cranberries.

Lunchbox LCM Bar

Lunchbox LCM Bar

I decided to decorate these bars with melted chocolate and mini smarties to give them extra lunchbox appeal. However, they’re not exactly a health food and would probably be classified a “sometimes food” at best.

LCM Lunchbox Bars

LCM Lunchbox Bars

On a positive note,  at least I know what ingredients are in them. Next time I make these I’m going to vary the ingredients and add some nuts and dried cranberries. They still won’t really be healthy but I think the flavour would be fabulous.

Thermomix LCM Marshmallow Bars LR

Thermomix LCM Marshmallow Bars LR

Initially, I used to make these bars on the stove but the Thermomix makes everything so much easier. If you’ve tried these by hand before and cursed you will be pleasantly surprised at how easy the Thermomix makes the process.

LCM Bar - Pin for Later

LCM Bar – Pin for Later

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9 thoughts on “Homemade LCM Bars in the Thermomix”

  1. Crystal says:

    Looks great,
    How long will they keep in the fridge?

    1. Julie Carlyle says:

      Hi Crystal
      There is nothing that would go off in this recipe so they can be kept for quite a while. I would say 2 weeks. The only concern would be the rice bubbles becoming less crisp.

  2. Stephanie@ApplesforCJ says:

    5 stars
    What a great idea to make these at home since you can control the ingredients. Reminds me of rice krispy treats I used to eat. Love the idea of adding fruit and nuts for a healthier version.

    1. Julie says:

      Thanks Stephanie ????

  3. Sarah @ Champagne Tastes says:

    5 stars
    I’ve never used a thermomix (and I’m actually not completely sure what they are???).. but these bars look delicious! I’ll have to look up thermomix.. it sounds so amazing!!!

  4. Amanda says:

    5 stars
    I have never heard of Thermomix. The recipe sounds good, but I’m just not sure how this translates if you don’t have this machine.

    1. Julie says:

      Hi Amanda, The Thermomix has just arrived in the US so you will undoubtedly be noticing it soon. The machine mixes, cooks, steams, food processes, kneads etc.

  5. Pam Greer says:

    5 stars
    Those look so good!

  6. Sara | Belly Rumbles says:

    5 stars
    They look really great and so simple to make in the Thermomix. Love the drizzle of white chocolate over the top of them as well, so pretty.

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