Melt in marshmallows until almost smooth (take off heat when there are still a few lumps left and melt remaining by stirring).
Add vanilla.
Add cereal and mix thoroughly.
Pour into greased 9x13 pan. Press flat with greased hands.
Melt chips over LOW heat (4) and spread over bars.
Nutrition Info Per Serving: Calories 486 Total Fat 22 g Cholesterol 11 mg Sodium 92 mg Potassium 151 mg Total Carbohydrate 73 g Dietary Fiber 2 g Sugars 55 g Protein 3 g