A mainstay of French celebrations, the crumbly, ganache-filled macaron is finally catching on here, thanks to versions now available at patisseries like Dessert Club, ChikaLicious, L.A. Burdick, and François Chocolate Bar. Most recently, Adour Alain Ducasse’s shop at the St.Regis (2 E. 55th St., at Fifth Ave.; 212-710-2277) has begun retailing its macarons (pictured from bottom, chocolate/passion fruit, raspberry, pistachio, and orange); you can also order any combination of its standard offerings (which include dark chocolate, coffee, and coconut) with 48 hours notice; $15 for a half-dozen.