You will love this gorgeous Rice Bubble slice! These chewy, crispy squares are the perfect balance of rice cereal, marshmallows and butter. It’s the easiest no-bake slice that comes together in minutes with only 4 ingredients and is always a favourite with kids (and kids at heart!).
Rice Bubble slice is a sweet, no-bake slice made with butter, marshmallows, vanilla and rice cereal. A classic Australian recipe, most Aussies would have grown up enjoying them at kids’ birthday parties or in their lunchboxes. They taste delicious and are SUPER easy to make with only a few common pantry ingredients.
Along with honey joys, chocolate crackles and Mars Bar slice, they are perfect for serving at kids’ parties, to keep in the fridge for an afternoon snack or any time you need a sweet treat. And if you’re looking for a healthier version, check out these healthier LCM bars!
Why you’ll love this recipe
- Quick and easy – 4 simple ingredients, one pot and about 10 minutes prep time are all you need. Just melt and mix!
- Budget friendly ingredients – making your own version at home is a much cheaper alternative to buying store-bought bars. And you know exactly what is going into them!
- No need to turn on the oven. The perfect no-bake treat!
- Perfect for parties –always a crowd pleaser, they are perfect for parties, school fetes, bake sales or a lunchbox snack.
- Old fashioned favourite – Australia’s version of Rice Krispie treats, Rice Bubble slice is a retro dessert that everyone loves. One bite will remind you why they are a staple party recipe!
- So delicious – crunchy, chewy, buttery and downright delicious.
Ingredients you will need
** This post contains tips and instructions to achieve the best possible results. This photo is a great guide for when you are in the supermarket, but for full ingredient quantities and methods, please scroll down to the detailed recipe card below!
- Rice Bubbles – also known as Rice Krispies, Rice Bubbles are a cereal made from puffed white rice. While Rice Bubbles are not gluten-free, similar gluten-free versions can be found in supermarkets and health food stores if you require gluten-free rice bubble slice. Use a brand-new box of Rice Bubbles, for maximum freshness.
- Marshmallows – white marshmallows are melted together with butter and vanilla to bind the slice together. I use only white marshmallows, but you can use a mix of white and pink (although the flavour and colour of the slice will vary). Pascalls marshmallows are a great choice, but you can use any type of white marshmallow. If they are larger in size, they will need to be chopped first so that they melt quickly and evenly.
- Butter – adds richness and flavour to the slice, as well as helping to bind it. Salted butter adds depth and flavour to balance the sweetness. Use real butter, rather than butter substitutes or margarine.
- Vanilla – enhances the flavour and adds extra depth. Don’t skip it! Use vanilla bean paste or extract for best results.
Optional ingredients;
- Sprinkles – use your favourite, colourful sprinkles to decorate the top of the slice. Or swap them for chocolate bits, melted chocolate or any of your favourite toppings!
- Salt – if using unsalted butter, a pinch of salt helps to balance the sweetness and elevates the vanilla flavour.
Step by step guide
Full ingredient notes and quantities can be found in the detailed recipe card below. But here is a brief overview of what you can expect;
1. Melt the butter, marshmallows and vanilla together on the stove, on low heat.
Continue to stir over low heat so that the mixture doesn’t catch or burn on the bottom of the pan.
2. Once the marshmallow mixture is melted and smooth, remove from the heat and gently stir in the Rice Bubbles, straight into the pot.
3. Transfer the mixture to a lined baking tin and smooth the top with a non-stick spatula (metal spoons will stick!). You can use an extra piece of baking paper over the top to help you smooth the slice without sticking.
If decorating the slice with sprinkles, add them to the top of the slice.
Refrigerate for at least an hour, or until firm and set.
Expert tips
- Measure the ingredients for best results. Use kitchen scales, where possible, for accuracy. The perfect slice requires the right ratio of butter, marshmallows and rice cereal. Too much or too little can affect the texture and structure of the slice.
- Avoid overcooking the marshmallow mixture, or it can harden.
- Line the slice tin and leave the sides overhanging, for easy removal of the slice once it has set.
- Use a layer of baking paper on top of the slice while you press it into the tin. This prevents the mixture from sticking to everything as it is shaped. Alternatively, use a non-stick silicone spatula to gently flatten the slice.
- Don’t press the mixture too firmly into the tin. While flattening into the tin helps to form perfect squares, pressing too hard will make them hard and will crush the Rice Bubbles.
- Customise the toppings to suit. Decorate with some coloured sprinkles, mini M&Ms, Smarties or a drizzle of milk or white chocolate.
FAQs
This slice will keep for 5 days, in an airtight container in the fridge.
These treats are freezer-friendly. Allow them to cool and set completely before slicing and transferring to a freezer-safe container. Separate any layers with baking paper to prevent the slices from sticking together and freeze for up to 3 months. The slices will thaw at room temperature in around 20-30 minutes when you are ready to eat them.
This recipe will make around 12 slices, but of course the pieces can be cut smaller or larger, depending on your needs.
While regular Rice Bubbles contain gluten, there are almost identical versions that are certified gluten-free. Choose a gluten-free version if required and be sure to check your marshmallows to make sure they are gluten free.
Related recipes
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Rice Bubble Slice
Ingredients
- 150 grams Rice Bubbles 5 cups
- 70 grams butter cut into cubes
- 400 grams white marshmallows
- 1 teaspoon vanilla extract or paste
Optional (to decorate)
- sprinkles or use chocolate bits, mini M&Ms or a drizzle of melted chocolate.
Instructions
- Grease and line a 20cm x 20cm square baking tin with baking paper. Leave the edges slightly overhanging, to help remove the slice later. Set aside.
- Slowly melt the butter, marshmallows and vanilla together in a large pot over very low heat until melted and mostly smooth (around 3-5 minutes). Stir continually, to prevent the mixture catching on the bottom of the pan.
- Remove from the heat and add the Rice Bubbles to the pot. Stir to combine.
- Transfer the Rice Bubble mixture to the prepared tin and use the back of a silicone spatula to gently press the mixture into the tin. Smooth the top. An extra piece of baking paper can be used to help smooth the top without the mixture sticking to everything.
- If using sprinkles, add them to the top of the slice.
- Place the slice into the refrigerator for at least an hour, until set.
- Remove the set slice from the tin and slice into squares of desired size.
Video
Notes
- Also known as Rice Krispies, Rice Bubbles are a cereal made from puffed white rice. While Rice Bubbles are not gluten-free, similar gluten-free versions can be found in supermarkets and health food stores if you require gluten-free rice bubble slice. Use a brand-new box of Rice Bubbles, for maximum freshness.
- Measure the ingredients for best results. Use kitchen scales, where possible, for accuracy. The perfect slice requires the right ratio of butter, marshmallows and rice cereal. Too much or too little can affect the texture and structure of the slice.
- Avoid overcooking the marshmallow mixture, or it can harden.
- Line the slice tin and leave the sides overhanging, for easy removal of the slice.
- Use a layer of baking paper on top of the slice while you press it into the tin. This prevents the mixture from sticking to everything as it is shaped. Alternatively, spray a silicone spatula with a little oil spray and use it to gently flatten the slice.
- Don’t press the mixture too firmly into the tin. While flattening into the tin helps to form perfect squares, pressing too hard will make them hard and will crush the Rice Bubbles.
- Customise the toppings to suit. Decorate with some coloured sprinkles, mini M&Ms, Smarties or a drizzle of milk or white chocolate.
- Storage; This slice will keep for 5 days, in an airtight container in the fridge.
- Freezing; These treats are freezer-friendly. Allow them to cool and set completely before slicing and transferring to a freezer-safe container. Separate any layers with baking paper to prevent the slices from sticking together and freeze for up to 3 months. The slices will thaw at room temperature in around 20-30 minutes when you are ready to eat them.
- Please note that the nutrition information is based on the slice being cut into 12 pieces, with one piece being one serve. The nutritional information is an estimate only and does not take into account any additional toppings or sides served with the slice.
- This recipe is made using Australian cups and spoon measurements. Any reference to cups or spoons in this recipe is in Australian metric. Due to cup sizes varying from country to country, I advise adjusting if necessary.
Nutrition
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Update notes: This recipe was originally published in January 2022, but was re-published with new information and photos in March 2023.
riley says
no measurements ew
Andrea Geddes says
Hi Riley. The measurements are in the detailed recipe card at the bottom of the post. You can read through the post for helpful tips, or hit the ‘jump to recipe’ button at the top of the post to head straight to the measurements.