In a large microwave mixing bowl place margarine, marshmallows and chocolate chips. Microwave for two minutes, then stir. Microwave for an additional minute or until fully melted and mixed.
Can also be melted on stove burner if preferred.
add peanut butter and conf. sugar and mix until smooth then add crispy rice and fold into mixture until all crispy rice is covered.
Spoon mixture into a 6" X 10" X2" pan or pyrex dish and press to ends and sides of pan or dish until smooth. (Lightly spray hands or spatula with cooking spray for easier spreading) Let stand until firm before cutting into squares or bars.