Preheat the oven to 320℉. Line a baking sheet with parchment paper and set aside.
In a medium microwave safe bowl, microwave the peanut butter and honey for 30 seconds. Mix until smooth. Mix in the cinnamon and vanilla.
Add in the oats and mix until the oats are completely coated.
Pour the oat mixture on the prepared baking sheet and spread into one even layer.
Bake in the preheated oven for 17 minutes, mixing and turning the mixture at around the 15 minute mark. Remove from the oven and allow to cool completely.