Quick, no-bake peanut butter oatmeal bars made with just three ingredients—creamy peanut butter, honey, and old-fashioned oats. Ready in 10 minutes of hands-on time plus chilling, they make an easy make-ahead snack or portable breakfast.
Place the peanut butter and honey in a small saucepan over medium-low heat. Stir constantly until the mixture becomes smooth and fully melted, about 3–5 minutes, then remove from the heat.
Mix in the oats:
Immediately add the oats to the warm peanut butter–honey mixture and mix thoroughly so every oat is coated and there are no dry pockets.
Press and set the bars:
Grease a 9-inch square pan or line it with parchment for easy removal.
Transfer the oat mixture into the prepared pan and press it down firmly and evenly with a spatula or the back of a spoon to compact the mixture.
Allow the pan to cool to room temperature. Once cooled, cover or wrap the pan and chill in the refrigerator for at least 1 hour so the bars firm up.
Lift the set block out of the pan (use the parchment if lined) and slice into 9 bars. Store in an airtight container for up to one week.