In a bowl, cream butter, sugar and egg until well blended. Add lemon juice and zest. Combine flour, baking soda, cream of tartar and salt; stir into creamed mixture. Add almonds. Cover and refrigerate the dough for at least 1 hour or overnight.
Roll into 1-in. balls. Place on ungreased baking sheet. Bake at 350° for 10-12 minutes or until bottoms are lightly browned (cookies will not brown on top).
Remove immediately to wire racks; cool for 5 minutes, then roll in confectioners' sugar.
Every editorial product is independently selected, though we may be compensated or receive an affiliate commission if you buy something through our links. Ratings and prices are accurate and items are in stock as of time of publication.