Preheat the oven to 350°F. Line 2 baking sheets with parchment paper.
In the bowl of a stand mixer fitted with the paddle attachment, add the butter, powdered sugar, light brown sugar, and vanilla extract. Mix on low until combined and there are no butter chunks.
Add in the flour and mix on low until combined into a smooth dough, it should feel like play dough in your hands.
Using your hands, roll the dough into 24 balls and place on the prepared baking sheets. Flatten them slightly so they are about 2 to 2-½ inches in diameter. Using a fork, poke them three times in the center.
Bake for 18 to 21 minutes or until golden brown on the bottoms and edges. Allow to cool completely on the baking sheets.
Store in a cool dry place for up to 7 days.
Notes
Gluten Free — Replace the all purpose flour with 226 grams (scant 1 ½ cups) gluten free flour blend and 57 grams (½ cup plus 1 tablespoon) organic coconut flour.High Altitude — Bake at 350°F for 15 to 18 minutes or until golden brown on the bottom and edges.