Crispy Rice Candy

In a large bowl, combine cereal, peanuts, marshmallows and peanut butter. Stir until evenly mixed.
In a microwave-safe bowl, or in a double boiler, cook chocolate until melted. Stir occasionally until chocolate is smooth. Stir chocolate into cereal mixture. Mixture will be slightly runny.
Drop by tablespoons onto waxed paper. Let set until firm, 2 hours. Store in an airtight container.