These small-batch Peanut Butter Cookies are easy to make, super peanut buttery, and SO addictive.
Pre-heat your oven to 350°F and line a baking sheet with parchment paper or silicone baking mat.
In a medium bowl, combine peanut butter, softened butter, brown sugar, granulated sugar, egg yolk, and vanilla. Whisk together until smooth.
Stir in flour mixture until just combined. Scoop rounded spoonfuls of the dough and roll into 6 balls. Place dough onto prepared cookie sheet and use a fork to firmly press a crosshatch pattern onto the tops of the cookies.
Bake for 8 to 11 minutes, until the edges of the cookies look set, but the cookies are still pale (for a crispier cookie, bake for 10 to 12 minutes until the cookies begin to darken). Cool on the baking sheet for at least 10 minutes before moving (cookies will be quite soft until they cool).
*Correct flour measurement is very important in this recipe. For best results, measure by weight or the Spoon and Sweep Method (stir the flour in your container to fluff it up and then spoon it into your measuring cup, sweep excess off with the flat of a knife).