. Heat oven to 350 degree F. Combine flour, baking powder, and salt in a bowl.
Scrape out seeds from vanilla bean. Beat butter, sugar, and vanilla seeds (or
vanilla extract if using) in a large mixing bowl until light and fluffy. Beat in
egg. At low speed, beat in flour mixture until blended. Spoon dough into a large
pastry bag fitted with a 1/2-inch star tip. Pipe dough into 2-1/2-inch-wide
circles 1 inch apart on 2 ungreased cookie sheets. Bake until cookies are golden
brown at edges, 10 to 12 minutes.
. Meanwhile, in a large bowl, whisk confectioners’ sugar and enough hot water
to make a thin glaze. Transfer cookies to a wire rack set over a piece of waxed
paper. Immediately brush hot cookies with glaze. Let stand 30 minutes until
glaze sets. Makes about 2 dozen cookies.
