Forget pop-up restaurants. That’s so two months ago. The new hot spot this week isn’t popping up but rather traveling into town in an Airstream trailer, and it’s got a warm, gooey center. This Friday, all the way from NYC, culinary guru Dorie Greenspan and her CookieBar are setting up shop! If you haven’t heard of four-time James Beard Award winner, best-selling cookbook author, and celebrity baker Dorie Greenspan (author of Baking With Julia and Baking From My Home to Yours), then boy, you’re in for a treat. Literally. Greenspan’s iconic CookieBar touts “cookies for grown-ups,” with offerings like chocolate chunkers (with Valrhona Chocolate, dried cherries, and cashews) and classic blondies (with Valrhona Jivara milk chocolate, coconut, and toasted pecans). These sweets will tempt anyone young at heart. CookieBar’s Austin trailer arm will be serving Greenspan’s iconic sablé cookies. Known to the layperson as French vanilla shortbread cookies (“sablé” means “sandy” in French), they are the most buttery, delicious sweet I’ve tried in a long time. Deceptively simple, the icebox cookies consist of just a few basic ingredients, which are transformed with the Greenspan magic touch. These defiantly question, “Who you callin’ sugar cookie?” We all know Austin is a cool city, with tons of trailers and even more giddy gourmands. But why this visit from the venerable Greenspan? Austin is hosting the International Association of Culinary Professionals (IACP) conference from June 1–June 4. There, Greenspan will be premiering her new app, called “Baking With Dorie.” It’s the first app in the CulinApp series, which showcases well-known chefs and their cooking styles, techniques, and personalities through videos and different viewing methods. (Another fun Texas connection: CulinApp is based in Houston.) While you preview “Baking With Dorie,” you can snack on as many sablé cookies as you can get your hands on, all gratis. (The app, which features 25 recipes from the eponymous book, will be officially available on iTunes this summer for $7.99.) A word to the wise, though: Get there early. The CookieBar trailer opens downtown at Brush Square Park at 10 a.m. on Friday morning, and Greenspan and her son, Josh, will be handing out sablé cookies until they run out. I’m guessing that will be around, oh, 10:30. Brush Square Park, across from the Hilton (409 E. 5th). Open Friday, June 3, 10 a.m. until they run out. Posted by Megan Giller