"If you've ever had a Rice Krispie Treat, then you know just how yummy they are. However, the regular butter, marshmallow and cereal recipe has never tasted like the real thing to me. I think this recipe is dead on. Not to mention, addicting!"
In a large saucepan, melt butter over low heat. Add brown sugar into melted butter and stir until sugar has dissolved. Add vanilla and marshmallows and stir until completely melted. Add cereal slowly, stirring to make sure it is covered in marshmallow.
Spread onto prepared cookie sheet and allow to cool.