Preheat your oven to 325℉.
In a large bowl, combine the peanut butter, maple syrup, honey, and vanilla. If it's a little stiff, heat it up in the microwave for 15-30 seconds.
To the peanut butter mixture, add the cinnamon, oats, and chopped peanuts. Stir to combine.
On a parchment-lined baking sheet spread out the oat mixture in a thin even layer.
Bake at 325℉ for 20-25 minutes, until golden brown.
Allow to cool on the sheet for at least 15 minutes, then break it apart.