Sweet Palmiers

Preheat oven to 400 °F. Sprinkle some sugar on a work surface and cover it with a puff pastry square sheet. Then sprinkle more sugar evenly over pastry sheet and roll it out into a 10-inch square with a rolling pin. Fold in two opposite sides of the pastry sheet square so that they the sides meet in the center. Fold in same sides of the pastry again. Fold one half of the pastry over the other. Cut pastry crosswise into 1/2-inch-thick slices. Dip cut sides of each piece in sugar and arrange, cut side down, on an ungreased baking sheet. Repeat with three remaining pastry sheets. Bake palmiers in batches in middle of oven until golden on bottom, about 12 minutes. Turn over and bake until golden on bottom, 5 to 7 minutes more, then transfer to a rack to cool completely.