Preheat your oven to 350 degrees Fahrenheit. Line baking sheets with parchment paper and set aside.
In a medium bowl whisk together flour, baking soda, salt, and ground cinnamon. Set aside.
3 cups all purpose flour, 1 teaspoon baking soda, 1/2 teaspoon ground cinnamon, 1/2 teaspoon salt
In a large bowl, beat together the butter and peanut butter until smooth.
3/4 cup creamy peanut butter, 12 tablespoons unsalted butter
Add the granulated sugar and brown sugar and beat until the batter is light and fluffy, between 3 to 6 minutes.
1 cup light brown sugar, 1 cup granulated sugar
Add in the pumpkin, egg yolk, and vanilla extract. Beat until just combined.
1 egg yolk, 1/2 cup pumpkin puree, 1 teaspoon vanilla
Add in the flour mixture and beat on low until it is integrated, turning up the mixer and beating until just fully combined.
Using a cookie scoop, create 1-inch balls. Place on cookie sheet, approximately 2 inches apart. Use a fork push down one way and then turn the fork pushing down the other way making a hatch mark pattern. Bake for 12 minutes, rotating halfway through. The edges of the cookies should be golden brown.