Fudge

1 1/2 stick margarine
3 cups sugar
2/3 cup evaporated milk
1 - 7 oz jar of marshmallow cream
1 pkg (10 oz) peanut butter chips or 1 pkg (12 oz) chocolate chips

Bring first 3 ingredients to a full boil stirring constantly. Boil 5 minutes (use timer.)  Remove from heat.  Stir in chips and marshmallow cream - stir hard until chips and cream are melted.  Pour into greased 13X9-1/2 in baking dishes or pans. Cool completely - cut into serving pieces.