Preheat the oven to 325ºF and line a rimmed baking sheet with parchment paper. In a large bowl, combine the oats, peanut butter, oil, maple syrup, salt, and cinnamon. Mix well, until the oats are well coated. (If your peanut butter looks thick, you can stir the wet ingredients together first, then add in the oats last, so everything is mixed evenly.)
Stir in the peanuts, then spread the granola mixture out onto the prepared pan. Bake at 325ºF for 15 minutes. When the timer goes off, remove the pan and give the granola a stir so it will crisp up evenly. Then return the pan to the oven to bake for 10 more minutes.
When the granola looks lightly golden, remove the pan from the oven and let it cool completely. It will crisp up even more as it cools. Then serve it with your favorite milk or yogurt, and any toppings you love. Leftover granola can be stored in an airtight container at room temperature for up to 2 weeks, or in the fridge for up to 1 month.
Notes
Nutrition information is for an 1/8th of the batch, which is roughly 1/2 cup. This information is automatically calculated, and is just an estimate, not a guarantee.• Feel free to use almond butter and sliced almonds for a peanut-free alternative.