S'more Rice Crispy Treats

These are delicious...and addicting, beware!  Perfect for a s'more craving!  -Kristin

6 cups marshmallows
4 Tablespoons butter softened
4 teaspoons vanilla extract
5 cups Rice Krispies
2 cups graham crackers, broken into coarse pieces
2 cups milk chocolate chips, or cut up Hershey bars

• In a large microwave safe bowl place the butter and the marshmallows in.  Microwave until the marshmallows are melted.
• Remove from the microwave and stir well.  
• Stir in the remaining ingredients.
• Place into a greased 9x13 pan.