A Little Slice of Heaven

1 stick salted butter
10 cups mini marshmallows, divided (approximately 2 bags)
8 cups Fruity Pebbles cereal (1 box)
2 teaspoons vanilla

Line a 9x13-inch baking pan with waxed paper. You can use an 8x8-inch if you prefer thicker treats. Spray with a bit of butter-flavored cooking spray and set aside.
In a large pot over medium heat, melt the butter. Add 8 cups of the marshmallows, stirring continuously with a wooden spoon, until completely melted. Remove from heat and add the vanilla, Fruity Pebbles and the remaining 2 cups of marshmallows. Stir until completely combined. Pour mixture into prepared baking dish. You can spray your hands with cooking spray to prevent the mixture from sticking to your hands. Gently press the mixture into the pan. Allow the treats to cool for about 30 minutes or until set. Remove from the pan an cut into squares. Store treats in an air-tight container.