Place 2 glasses, each with about a 2-inch-diameter base, upside down on work surface. With spatula, quickly lift 1 hot cookie and gently shape over bottom of glass to resemble an open tulip. Repeat with second cookie. When cookies are cool, about 15 minutes, transfer to wire rack. (If a cookie becomes too firm to shape, return it to cookie sheet and place in oven to soften slightly.)