It's Day 21 of #25DaysOfCookies! #Checkerboard Cookies are an adorable holiday treat. But it took some detective work to develop our French butter cookie recipe with a properly sandy texture. Cutting back on the butter in our sable recipe helped, but the breakthrough was using a traditional French ingredient—hard-cooked egg yolk—which eliminated excess moisture and perfected the texture of the cookies. Grab the link in our bio and be sure to tag your photos along the way with #ATKHoliday.