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lego rice krispie treats - m&m rice krispie treats - make these lego block m&m rice krispie treats
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5 from 3 votes

Fun Lego M&M Rice Krispie treats

These adorable Lego Rice Krispie Treats are the perfect birthday party treat and they take under 30 minutes to make. They’re so simple to make that you’re kids can join in. 
Course Dessert
Cuisine American
Prep Time 10 minutes
Chilling Time 2 hours
Total Time 10 minutes
Servings 6 small Lego bars
Author Mas & Pas

Ingredients

Lego Rice Krispie treats

  • 2 cups Rice Krispie cereal
  • tbsp butter (20 grams)
  • 1 cup marshmallows (90 grams)
  • 1 bag M&M chocolate candies (100 grams)

Coloured icing

  • icing sugar (180 grams)
  • 2 tbsp milk
  • 3 tubes of food colouring (we have used red, blue and green)

Instructions

Rice Krispie treats

  • Measure out the Rice Krispies and set aside in a large mixing bowl.
  • Take a small oven dish (about 9 x 5 inch) and grease well or line with greaseproof paper.
  • Melt the butter in a saucepan on a low heat.
  • Add the marshmallows and stir constantly until melted and well combined with the butter.
  • Pour your mixture over the Rice Krispies and stir together quickly before it cools.
  • Straight away, spoon the mixture out onto your greased baking dish.
  • Make a level layer about 2 cm deep and press it with the back of a spoon. If the mixture is too sticky and stringy to do this, then place a sheet of greaseproof parchment paper over the Rice Krispie mixture and push down with your hands until compacted. They won’t stick to the parchment paper and you will end up with nice thick bars.
  • Place in the fridge to chill for 2 hours or overnight.

Coloured icing

  • Measure out the icing sugar.
  • Spoon in 2 tablespoons of milk and mix. It should be a thick liquid. If you need to add up to 1 more tablespoon milk to get the right consistency.
  • Split your mixture between three small bowls, one for each colour.
  • Add a few drops of food colouring to each icing bowl and mix. See how the colour looks compared to the colour of your M&Ms and add some more colouring if necessary.

Decorating the 'Lego Blocks'

  • Remove your Rice Krispie mixture from the fridge when it has set.
  • Cut into rectangles with a sharp knife and remove from the dish.
  • Pick them up and dip one side carefully into your coloured liquid icing.
  • Turn it over and place it on a flat surface. If you need to top up the coloured icing by adding a little more onto the top with a spoon. You should end up with a thick layer of icing.
  • Let any excess icing drip off and stick the M&Ms on. Allow the icing to harden and enjoy!