From Brittany to Pittsburgh’s Millvale neighborhood, Jean-Marc Chatellier’s French Bakery makes French pastries and desserts, including butter-rich croissants and the regional specialty gâteau Breton. Jean-Marc’s homeland shapes the bakery’s signature offerings, while its Hungarian nut roll—made from scratch with walnuts, honey and butter, without fillers or preservatives—adds another distinctive tradition. The bakery also serves layered cakes by the slice, including its elaborate 10-layer Opera cake.