Indoor S'mores or Golden Graham Bars

8 cups Golden Grahamscereal
5 cups marshmallows
1 1/2 cups milk chocolate chips
1/4 cup light corn syrup
5 Tablespoons butter or margarine
1 teaspoon vanilla
1 cup miniature marshmallow, if desired
Measure cereal into a large bowl. Butter a 9x13 pan. In a large microwavable bowl, microwave 5 cups marshmallows, chocolate chips, corn syrup, and butter uncovered on high 2-3 minutes, stirring every minute, until melted and smooth when stirred. Stir in vanilla.
Pour over cereal; quickly toss until completely coated. Stir in 1 cup marshmallows. Press mixture evenly into pan, using buttered back of spoon. Let stand 1 hour or refrigerate if you prefer a firmer bar