Step 1: Melt Marshmallows and Butter

Combine 200 grams of white marshmallows and 100 grams of butter (cut into pieces) in a microwave-safe bowl. Microwave on high for about 1 minute, stirring every 30 seconds, until the mixture is smooth and melted. If you don't have a microwave, you can gently melt them together in a saucepan over a low heat, stirring continuously.

Step 2: Combine with Puffed Rice Cereal

In a large mixing bowl, add 5 cups (approximately 225 grams) of puffed rice cereal. Pour the melted marshmallow and butter mixture over the cereal and carefully stir until all the rice bubbles are thoroughly coated.

Step 3: Prepare and Press into Dish

Line a large rectangular dish with non-stick baking paper, ensuring there is enough paper on each side to easily lift the mixture out later. Pour the rice bubble mixture into the lined dish and gently press it down with a spatula until it is nice, even, and smooth on top, being careful not to crush the rice bubbles too much.

Step 4: Add Toppings

Drizzle approximately 50 grams of melted white chocolate over the top of the pressed mixture. Then, scatter approximately 50 grams of candy-coated chocolate buttons (such as mini M&Ms) evenly over the white chocolate drizzle.

Step 5: Chill and Serve

Place the dish into the fridge for about 2 hours, or until everything is chilled and set. Once chilled and set, lift the mixture out of the dish using the baking paper and chop it into individual bars. If making these for lunchbox treats, wrap each individual bar in plastic wrap to keep them fresh and store them in the fridge until required.

• Ensure baking paper extends over the sides of the dish for easy removal.

• Gently press the mixture into the dish to avoid crushing the rice bubbles.

• Wrap individual bars in plastic wrap to keep them fresh if using as lunchbox treats.

• Keep the bars in the fridge until they are required.

• Use milk chocolate or dark chocolate instead of white chocolate for the drizzle.

• Replace the candy-coated chocolate buttons with any other candy or sprinkles you like.