Line a loaf tin with baking paper. This will ensure that the bars can be removed easily once they’re set.
In a medium saucepan, place the peanut butter, milk, butter, and honey. Heat over medium heat, stirring constantly until the mixture becomes smooth and starts to bubble.
Continue stirring until a caramel-like consistency forms. Watch closely as the mixture thickens and darkens; it should be glossy and able to create a channel when you run a spoon through it.
Remove the saucepan from the heat. Stir in the rolled oats until they are fully coated in the caramel mixture. This should create a thick, sticky mix.
Transfer the mixture to the lined loaf tin, pressing it down firmly to ensure that it holds its shape. You want it to be compact to form solid bars.
Refrigerate the tin for about 4 hours, allowing the bars to set properly. This step is crucial for achieving the right texture!
If you want, melt some chocolate chips and drizzle them over the top to create a decorative pattern. This adds a nice touch and extra sweetness.
Once set, remove the bars from the tin and slice them into squares or rectangles, depending on your preference.
Enjoy your delicious Peanut Butter Oatmeal Bars as a snack or breakfast option. They’re perfect on their own or paired with a glass of milk!