Step 1

Preheat the oven to 350 degrees F. Line two large baking sheet with Silpat baking mats or parchment paper. Set aside.

Step 2

In a medium bowl, whisk together the oats, flour, baking soda, salt, and cinnamon. Set aside.

Step 3

Using a mixer, beat the butter, peanut butter, and sugars together until creamy, this will take about 2 minutes, on medium speed. Beat in the egg and vanilla extract. Mix until well combined.

Step 4

On low, add in the dry ingredients and mix until just until the combined.

Step 5

Scoop the cookies into round balls and place on the prepared baking sheets, leaving 2 inches in between cookies. Bake for 10-12 minutes, or until the cookies are lightly browned around the edges, but still soft in the middle.

Step 6

Remove cookies from oven and let cool on the baking sheet for about 5 minutes. Transfer to a wire rack and cool completely.