Line an 8x8-inch square baking pan with parchment paper or foil, and set aside.
In a large microwaveable bowl, add the peanut butter and honey, and heat in 20 second intervals until the peanut butter is runny and can be combined easily with the honey.
Add the oats and fold in until incorporated.
Press the mixture firmly into the prepared pan.
Cover and refrigerate for at least 1 - 2 hours before removing and cutting into bars.
Video
Notes
These bars can be kept in an airtight container and stored in the fridge for 2 weeks. They also freeze well for up to 3 months. Thaw overnight in the fridge before serving.