Line a baking sheet with waxed paper.

Combine chocolate chips and peanut butter in a saucepan over low heat; cook and stir until melted, 2 to 3 minutes. Remove from the heat and stir in cornflakes until coated.

Drop 12 spoonfuls of cornflake mixture onto the prepared baking sheet. Chill in the refrigerator until cool, about 30 minutes.