In 1820, Missouri enacted legislation to tax bachelors between 21 and 50 years of age $1 per year for being unmarried. Mark the date with some cookies that look like buttons. Or are they flowers? Either way, they’re easy, and cute enough to serve at a party.
Preheat the oven to 350 degrees and place a rack in the center. Line 2 baking sheets with parchment paper or nonstick foil.
In the bowl of a stand mixer fitted with a paddle attachment, or in a large mixing bowl, using a handheld electric mixer, beat the butter, salt, and confectioners’ sugar on medium speed until creamy. Reduce the mixer speed slightly and beat in the egg and vanilla. By hand or using the lowest speed of the mixer, stir in the flour.
Shape the dough into ¾-inch balls and arrange 2 ½ inches apart on the prepared baking sheets. Use your finger to make an indentation in the center of each dough ball, then fill with preserves. Bake 1 sheet at a time for 10-12 minutes, or until the cookies are lightly browned around the edges. Let cool on the baking sheets for about 3 minutes, then transfer to a wire rack to cool completely.