A perfect spritz cookie recipe (with lemon and almond variations) from the folks at Cook's Illustrated/America's Test Kitchen. This recipe includes detailed instructions for piping which you can ignore if you're experienced. If using a pastry bag, use a star tip to create the various shapes. For stars, a 1/2- to 5⁄8-inch tip works best, but for rosettes and S shapes, use a 3/8-inch tip (measure the diameter of the tip at the smallest point). To create stars, hold the bag at a 90-degree angle to the baking sheet and pipe the dough straight down; stars should be about 1 inch in diameter. To create rosettes, pipe the dough while moving the bag in a circular motion, ending at the center of the rosette; rosettes should be about 1 1/4 inches in diameter. To create S shapes, pipe the dough into compact S’s; they should be about 2 inches long and 1 inch wide. If you make an error while piping, the dough can be scraped off the baking sheet and repiped. We had the best results baking these cookies one sheet at a time. When reusing a baking sheet, make sure that it has completely cooled before forming more cookies on it. Unbaked dough can be refrigerated in an airtight container for up to 4 days; to use, let it stand at room temperature until softened, about 45 minutes. Baked cookies will keep for more than a week if stored in an airtight container or zipper-lock bag. Recipe makes 6 dozen 1 1/2-inch cookies.