Indoor S'mores

I got this recipe from Real Mom Kitchen. I have yet to try them but I LOVE golden graham cereal bars from the store. Tell me if you try them.

8 cups Golden Graham Cereal
5 cups miniature marshmallows
1 1/2 cups milk chocolate chips (I used semi-sweet)
1/4 cup light corn syrup
5 Tbsp. butter or margarine
1 tsp vanilla
1 cup miniature marshmallows, if desired

Into large bowl, measure cereal. Butter 13x9-inch pan. In large microwavable bowl, microwave 5 cups marshmallows, the chocolate chips, corn syrup and butter uncovered on High 2 minutes to 3 minutes 30 seconds, stirring after 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 in pan, using buttered back of spoon. Let stand uncovered at least 1 hour, or refrigerate if you prefer a firmer bar. For squares, cut into 6 rows by 4 rows. Store loosely covered at room temperature up to 2 days.
Stove-Top Directions: Into large bowl, measure cereal. Butter 13x9-inch pan. In 3-quart saucepan, heat 5 cups marshmallows, the chocolate chips, corn syrup and butter over low heat, stirring occasionally, until melted; remove from heat. Stir in vanilla. Continue as directed above.