3/4 c. light corn syrup
3 tbsp. butter
1 pkg. (11.5 oz.) chocolate chips
1 tsp. vanilla
9 c. golden grahams cereal
3 c. miniature marshmallows

Grease 9 x 13 pan. Heat syrup, butter, and chips to boiling, stirring constantly. Remove from heat, stir in vanilla. Pur over cereal in bowl, toss until coated. Fold in marshmallows, 1 cup at a time. Press in pan with buttered back of a spoon. Let set for 1 hour, cut into squares. Store lightly covered at room temperature.