Grease a 9x9 baking dish-I prefer to use butter. Set aside.

In a large pot, begin melting the butter and add 10 ounces of miniature marshmallows. Stir over medium to medium low heat until melted.

Add the vanilla and stir.

Add the Rice Krispies cereal and the remaining six ounces of mini marshmallows.

Reduce heat and stir until combined and marshmallows begin to melt.

Lightly press mixture Into a greased 9x9 baking dish. Only lightly press and handle the mixture as little as possible. I like to use butter to grease the baking dish and also use butter on my hands when lightly pressing the mixture into the pan.

Allow time to cool. Cut and enjoy!