2/3 c. corn syrup
2 tbsp. butter
1 (11 1/2 oz.) pkg. chocolate chips
1 tsp. vanilla
8 c. Golden Grahams cereal
3 c. mini marshmallows

Grease pan. Heat syrup, butter and chips to boiling. Stir constantly. Remove from heat. Stir in vanilla. Pour over cereal. Toss until coated. Fold in marshmallows, one cup at a time. Press into pan lined with wax paper. Wait one hour.