Directions 8 steps | 20 Minutes
Measure and prep all ingredients.
In a bowl, whisk together the brown sugar, egg, egg yolk and vanilla until smooth.
Add the peanut butter and whisk until smooth.
Cover the bowl with plastic wrap and refrigerate for 30 minutes.
Preheat the oven to 350°F. Line a sheet pan with parchment paper. Use a medium cookie scoop, with a capacity of about 1½ tablespoons, to scoop out dough onto the parchment paper.
Sprinkle the cookies with flaky sea salt. Bake the cookies for 12-15 minutes, or until the edges are golden and set.
Let the cookies cool on the baking sheet for 10 minutes before transferring to a cooling rack to cool completely.