Line a baking sheet with parchment paper or wax paper.
In a microwave-safe large bowl, combine peanut butter and maple syrup. Whisk until smooth.
Microwave in 20-second increments on medium heat, stirring in between, until warm and smooth.
Add oats to the peanut butter maple syrup mixture. Stir until well combined.
Using a medium cookie scoop (about 2 ½ tablespoons), drop the peanut butter balls of dough onto the prepared cookie sheet, spacing them evenly. Flatten the chewy cookies with a fork to your desired thickness.
For a pretty presentation, you can also drizzle melted chocolate on top after the cookies have frozen.
Place the baking sheet in the freezer for 15-25 minutes, until the cookies are firm. Enjoy!