To make these ever-popular butter cookies, top cookies with a chocolate candy kiss while they're still warm. Buy an extra-large bag of the chocolate kiss candy so you'll have enough to make the cookies!
Beat butter at medium speed with an electric mixer until fluffy; add powdered and granulated sugars, beating well. Add eggs, oil, vanilla, and lemon juice, beating until blended.
Combine flour and next 3 ingredients; gradually add to sugar mixture, beating until blended.
Shape dough into 1-inch balls, and place about 2 inches apart on lightly greased baking sheets.
Bake, in batches, at 350° for 9 to 11 minutes or until set. (Do not brown.) After baking, immediately place one unwrapped milk chocolate kiss in center of each cookie, and cool.