Preheat oven to 350 degrees F. Spray a cookie sheet with a non-stick cooking spray.
Using a food processor, pulse the oats a few times just to break up the texture. Don’t completely mix it into a powder form. Set aside.
1 ½ cups old fashioned oats
In a large bowl, using an electric hand mixer or in the bowl of a stand mixer fitted with paddle attachment, beat together the butter, brown sugar, white sugar, eggs, molasses, and vanilla extract until combined.
1 cup (2 sticks) unsalted butter, ¾ cup light brown sugar, ½ cup granulated sugar, 2 large eggs, 1 tablespoon molasses, 2 teaspoons vanilla extract
In another bowl, whisk the flour, cinnamon, cocoa powder, baking soda, and salt. Add the dry mixture into the wet mixture and mix just until combined. Using a spoon or spatula, fold in the oats.
1 2/3 cup all-purpose flour, 1 ½ teaspoon ground cinnamon, 1 tablespoon unsweetened cocoa powder, 1 teaspoon baking soda, ¼ teaspoon kosher salt
Using a medium cookie scoop, scoop dough onto the prepared cookie sheet. Place cookie dough 3 inches apart because the cookies will spread.
Bake for 9-10 minutes; just until the edges crisp up. The middle may still look wet; do not overbake.
Allow the cookies to sit on the sheet for 5 minutes. Move to a cooling rack until completely cooled.