01 -
Coat a 33 x 23 cm rectangular pan evenly with non-stick spray and set aside.
02 -
In a large microwave-safe bowl, heat the melted butter gently.
03 -
Add the marshmallows to the bowl and stir to combine with butter.
04 -
Microwave the mixture for 45 seconds, remove, and stir thoroughly. Repeat heating for another 45 seconds, then stir until the marshmallows are completely melted and smooth.
05 -
Add the puffed rice cereal to the melted marshmallow mixture. Stir until all cereal is uniformly coated.
06 -
Evenly distribute the mixture into the prepared pan. Press firmly into an even layer using a spatula or lightly greased hands.