Ingredients
Method
- Whisk flour, baking soda, baking powder, and salt together in a medium bowl.
- Beat butter and 1 cup sugar with a mixer until pale and fluffy, about 2 minutes.
- Add egg and vanilla, then mix in sour cream until smooth.
- Gradually mix in dry ingredients until a soft dough forms. Scoop tablespoon-sized balls onto parchment-lined sheets, sprinkle with the 2 tbsp sugar, and bake at 375°F for 10 to 12 minutes.
- Cool on the sheet 5 minutes, transfer to a wire rack to cool completely, then dust with powdered sugar and serve.
Notes
If you prefer a thicker, slightly more domed cookie, chill the dough for 30 minutes before scooping. This resting time is not included in the prep or cook times.
