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["Cream together the butter, chilled shortening, and 3/4 cup of the sugar until light and fluffy.", "With a sharp knife halve vanilla beans lengthwise, then scrape the seeds directly into the butter mixture, mixing to combine.", "Beat in egg and vanilla extract until combined well.", "Sift together flour, baking powder, and salt; add to butter mixture and mix until just combined.", "Set a large sheet of waxed paper on a flat surface.", "Set dough onto the waxed paper and form dough into a 10x2"" log.", "Roll up dough log in wax paper, seal ends with rubber bands, and chill until firm, at least 4 hours and up to 3 days (stick wrapped log into a plastic ziptop baggie to keep from drying out).", "Preheat oven to 375 degrees F.", "Pour remaining 1/4 cup sugar onto a shallow platter.", "Remove wax paper and roll dough log in sugar (not all sugar will stick).", "Cut dough into rounds,1/4"" thick.", "Dip the cut sides of each cookie round into the remaining sugar on platter (add a little extra sugar if you need more).", "Arrange cookies 1/2"" apart on ungreased cookie sheets and bake one batch at a time in the middle of your oven 10-12 minutes, or until edges are a very pale golden brown.", "Remove baked cookies to wire racks to cool."]
