The most common mistakes made by home bakers, professionals say, have to do with the care and handling of one ingredient: butter. Creaming butter correctly, keeping butter doughs cold, and starting with fresh, good-tasting butter are vital details that professionals take for granted, and home bakers often miss.
03Scoop tablespoons of dough onto parchment, leaving more than 1 inch between cookies. Press each one down lightly with 2 fingers to flatten to a thickness of 1/2 inch. Leave any ridges and valleys on top of cookie intact, but smooth the edges.
04Bake about 15 minutes, rotating cookie sheets halfway through. Cookies should be pale but baked all the way through. Cool on sheets 5 minutes, then transfer to a rack and cool before storing in airtight containers up to 1 week.
05When ready to serve, make icing: Bring a small pot of water to a boil. Peel orange, being careful to remove only outer orange zest, and cut into thin strips. Blanch in boiling water 1 minute; drain. Sift confectioners’ sugar into a bowl. Whisk in 2 tablespoons milk. Whisk in more milk if needed to make mixture thin enough to spread. Add extract, salt and zest, and whisk to combine.
06Place cookies on a rack and drizzle icing over each one (make sure there is some orange zest in each spoonful). Icing will settle into cookie crevices; let harden.