14tablespoonsunsalted butter, softened but still cool
1cupsugar(200 grams)
¼cuppacked light brown sugar(50 grams)
1large egg
1teaspoonvanilla extract
2 ½cupsold-fashioned rolled oats
½teapoon flaky sea salt
Instructions
Preheat oven to 350 degrees. Line baking sheet with parchment paper. Whisk flour, baking powder, baking soda, and salt in a medium bowl.
Beat butter and sugars until light and fluffy. Scrape down bowl with rubber spatula, then add egg and vanilla and beat until incorporated. Scrape down bowl again. Add flour mixture gradually and mix until just incorporated and smooth. Gradually add oats and mix until well incorporated.
Divide dough into 24 equal portions, each about 2 tablespoons. Arrange on two baking sheets, spacing about 2 ½ inches apart, then press down slightly. Alternatively, you can divide and shape the dough, but put the unbaked dough portions on a plate and cover with plastic wrap. Chill for 2 hours until ready to bake.
Sprinkle a flake or two of sea salt on each cookie
Bake 13 to 16 minutes, rotating baking sheet halfway through if needed. Let cool for about 5 minutes, then carefully transfer cookies to a cooling rack.
Notes
Adding white chocolate to these cookies is optional.