Prepare a 9-inch square baking pan by greasing it well with butter.
In a large pan on the stove, melt the butter over medium heat.
Reduce the heat to medium-low; add all of the marshmallows EXCEPT for 1 cup.
Stir constantly, until the marshmallows are melted.
Remove from the heat, and stir in the vanilla.
Add the Fruit Pebble crispy cereal and the remaining one cup of mini mallows, and stir to combine well, making sure there are no dry pockets of cereal.
Add the cereal to the prepared pan, and use a spatula to spread it out to an even layer, taking care not to press or smash it down. If a spatula isn’t cutting it, get your hands lightly damp, and gently press out the cereal. A buttered bottom of a measuring cup also works well.
Let the rice crispy treats cool for 30 minutes before serving.
Notes
Melt your marshmallows at a low temperature.
Use fresh marshmallows and stick to the mini ones. They melt more easily and the cup of them thrown in with the cereal looks so cute.
Don’t push the mixture too firmly into the pan. You want them to be light and airy so gently spread them but don't smash it down.
This recipe works with all kinds of cereals. Give some of your favorites a try.