Our 3 ingredient Thermomix Rice Bubble Bars taste just like store-bought LCM bars! Made from rice bubbles, marshmallows and butter and prepped in just 15 minutes... don't forget to add sprinkles for a fun (and kid-approved touch!).
When you have hungry little mouths to feed, quick and easy recipes are just what you need!
And it doesn't get any easier than these Thermomix Rice Bubble Bars. Not only do they taste delicious, they're perfect for school lunchboxes!
An all-time favourite with the kids!
Why You're Going To Love This Recipe
If your kids love store-bought LCM bars, they'll love the homemade version too!
- 3 Ingredients - Made from just rice bubbles, marshmallows and butter (plus optional sprinkles!), these Thermomix Rice Bubble Bars are perfect for last-minute snacks.
- 15 Minutes Prep Time - So quick and easy to make! Plus the kids will love helping with this recipe (and licking the spoon!).
- Perfect For Lunch Boxes - These bars hold their shape in lunchboxes and stay perfectly crunchy all day long.
- Freezer-Friendly - Pop any leftovers in the freezer for 'grab and go' snacks. You can place pieces of the frozen slice directly into lunchboxes and they will have defrosted by recess time.
What You Need
Just 3 Ingredients!!!
That's right... just 3 ingredients (plus sprinkles if you want a colourful pop to the slice!).
Note: Please scroll to the recipe card at the bottom of the post for ingredient quantities and the full detailed method.
- Rice Bubbles - also known as Rice Krispies. You can use any brand (or home-brand) puffed rice you like.
- Marshmallows - if you want your Thermomix Rice Bubble Bars to look just like LCM bars, then use only white marshmallows. If you're not fussed with the look, you ca use a combo of white and pink marshmallows. I generally use the Pascall's brand of marshmallows.
- Butter - salted or unsalted is fine to use.
- Optional - sprinkles or 100s and 1000s give the slice a fun, bright pop of colour that the kids love.
Step By Step Instructions
It is SO quick and easy to make our Thermomix Rice Bubble Bars!
Note: Please scroll to the recipe card at the bottom of the post for ingredient quantities and the full detailed method.
Step 1 - Melt
Place the marshmallows and butter into the Thermomix bowl.
Melt until smooth (a few small lumps of marshmallow are ok!).
Step 2 - Mix
Add the rice bubbles to the Thermomix bowl and mix until all of the rice bubbles are completely and combined with the marshmallow mixture.
Note: you will need to insert the Thermomix spatula through the MC hole to help mix.
Step 3 - Chill
Press the mixture VERY firmly into a greased and lined baking tin.
Add sprinkles or 100s and 1000s (optional).
Chill for 2 hours or until set. Use a sharp knife to cut into small pieces.
Expert Tips
- You can use a mixture of pink and white marshmallows if you prefer.
- Use regular sized marshmallows (like Pascalls brand).
- Use a new box of rice bubbles (to avoid stale rice bubbles).
- Insert the Thermomix spatula through the MC hole and stir to to help mix the rice bubbles through the marshmallow mixture.
- Press the mixture VERY firmly into the slice tin. Use the back of a large spoon and press down firmly.
- Store the slice in the fridge for up to 1 week (keeping it in the fridge ensures it stays crunchy!)
- Freeze for up to 3 months.
FAQs
We recommend using a standard sized rectangular slice tin (18 X 28cm). Ensure it is greased and lined with baking paper before adding the mixture.
It's important to insert your Thermomix spatula through the MC hole when the rice bubbles are being mixed through the marshmallow mixture. Use the spatula to help combine while the blades are turning.
Using the REVERSE function will ensure that the rice bubbles are mixed gently rather than crushed!
Related Recipes
Browse some of our most popular lunch box slices here!
Thermomix Lunch Box Cookbooks
For more great lunch box recipes, check out our Thermomix Lunch Box Bundle of hardcopy cookbooks!
The bundle includes:
- Thermomix Lunch Box
- Thermomix Kids Snacks Volume 1
- Thermomix Kids Snacks Volume 2
Three Ingredient Rice Bubble Bars
Equipment
- Thermomix
Ingredients
- 75 g butter
- 200 g white marshmallows see notes
- 200 g rice bubbles or any puffed rice (approx 6 cups)
- 100s & 1000s to decorate, optional
Instructions
- Line the base and sides of an 18 X 28cm rectangular slice tin with baking paper - leave the baking paper hanging over the sides.
- Place the marshmallows and butter into the Thermomix bowl and cook for 4 minutes, 80 degrees, Speed 1 or until melted and combined. After approximately 2 minutes, use the spatula to scrape down the sides.
- Add the rice bubbles to the bowl and mix for 1 minute 20 seconds, Speed 1, Reverse, or until mixture has combined. Use the spatula to help mix.
- Pour the mixture into the prepared slice tin and use the flat side of a large spoon to spread across the tin and push down very firmly.
- If decorating, sprinkle the 100s and 1000s over the top of the slice. Place in the fridge for two hours or until set.
- Remove the slice from the fridge and cut into pieces.
Notes
- You can use a mixture of pink and white marshmallows if you prefer.
- Use regular sized marshmallows (like Pascalls brand)
- Use a new box of rice bubbles (to avoid stale rice bubbles)
- Store the slice in the fridge for up to 1 week (keeping it in the fridge ensures it stays crunchy!)
- Insert the Thermomix spatula through the MC hole and stir to to help mix the rice bubbles through the marshmallow mixture.
- Press the mixture VERY firmly into the slice tin. Use the back of a large spoon and press down firmly.
- Freeze for up to 3 months.
Nutrition
What was your favourite lunch box treat growing up?
