Preheat the oven to 350°F. Grease or line 2 baking sheets or cookie sheets with parchment paper.
Whisk together in a medium bowl:
Beat in a large bowl, or in a stand mixer with the paddle attachment, until well blended:
Stir the flour mixture into the butter-sugar mixture. Stir in:
Shape the dough into generous 1 ½-inch balls and place about 2 inches apart on the prepared baking sheets. Flatten the balls into ½-inch-thick rounds. Bake until the cookies are lightly browned all over, 12 to 14 minutes, switching oven racks and rotating the sheets halfway through. Let cool on the sheets for 2 to 3 minutes, then transfer to a wire rack to cool completely.