Get your ingredients and supplies ready and gathered together.
Put 16 oz of marshmallows and 4 tbs of butter into a microwave safe bowl.
Put the bowl with butter and marshmallows into the microwave for 30 - 60 seconds.
After the heating, stir things well.
Put the bowl back in the microwave for 30 seconds and stir again.
Repeat the heating and stirring until the marshmallows and butter are combined and melted.
Note: you can also melt them on the stovetop, for those instructions, see above in the post.
Slowly put 7 cups of Honeycomb cereal into the marshmallows while stirring.
Make sure the cereal gets evenly coated in marshmallows.
Use the spatula to move your treat mixture from your bowl into your pan.
Continue to use the spatula and press your treats down into the pan so that they are an even thickness.
Put the pan of treats aside for 30 minutes to cool.
Cut your treats into 16 squares.