No-Bake Cookies With Chocolate, Peanut Butter, and Chewy Oats

[Photograph: Vicky Wasik]

Believe it or not, these peculiarly American treats are a type of creamy peanut butter fudge masquerading as a chewy oatmeal cookie. Don't let the idea of fudge throw you off: As long as you're armed with a digital thermometer, this recipe couldn't be simpler, or more rewarding.