Mix peanut butter and honey together in a microwave-safe bowl. Heat in the microwave in 20-second increments until the mixture starts to dry out and become fragrant, about 2 minutes total time.
Stir oats into peanut butter mixture. Scoop onto the prepared baking sheet using a big scoop; flatten cookies with a fork or the back of a spoon. Place baking sheet in the freezer until cookies are completely firm and cool, 15 to 20 minutes.
