These simple three-ingredient peanut butter oatmeal bars come together in minutes and chill into chewy, portable snacks perfect for meal prep, lunchboxes, or an afternoon pick-me-up.
Combine the peanut butter and honey in a small saucepan. Warm over medium-low heat, stirring constantly until the mixture is smooth and fully integrated, about 3–5 minutes.
Mix in the oats:
Take the pan off the heat and immediately fold in the oats. Stir thoroughly so every oat flake is coated and no dry patches remain.
Press and set the bars:
Grease a 9-inch square pan or line it with parchment. Transfer the oat mixture to the pan and press it down firmly and evenly with a spatula or the back of a spoon.
Allow the mixture to cool to room temperature, then cover and chill for at least 1 hour to firm up. Slice into 9 bars and store in an airtight container in the refrigerator.