This Microwave Peanut Butter Cookie is a warm, nutty, no-egg peanut butter cookie for one cooked in the microwave. Ready in under five minutes from start to finish!

If you enjoy single-serve microwave desserts like the microwave chocolate chip cookie, microwave oatmeal cookie, microwave sugar cookie, or microwave brownie, this Microwave Peanut Butter Cookie is the perfect addition. It’s a single-serve dessert you can make from prep to finish in under five minutes, ideal for late-night snacking when you don’t want to heat the oven.
This cookie is made in a mug or ramekin in the microwave so you can skip the oven. The texture is tender, nutty, and chewy with a hint of softness from the milk, and it pairs beautifully with a cold glass of milk. For a classic look, I sprinkled chopped peanuts on top and pressed a criss-cross fork pattern into the dough.
If you prefer chocolate, stir in chocolate chips or press a Hershey’s Kiss on top after microwaving to make a peanut butter blossom-style cookie.