Brillat Savarin cheese is a soft, white, cow's-milk cheese with a velvety texture. This triple-cream French cheese is similar in flavor to Boursault and makes a good substitute. For a delightful treat serve with some fig preserves on a crusty artisanal bread. The best brand if you can find it is imported by La Ferme Imports.
This really is a dessert cheese and should be served with the freshest fruit like strawberries, guava or even passion fruit. Drink Champagne or Cava with this cheese.
Only purchase from a seller you can trust. This cheese should be consumed young and not overripe. Check for it in a good cheese shop or buy from a trusted online source; Amazon offers a few: Brillat-Savarin
Good substitutes for Brillat Savarin include:
The folks at Cheesemaking.com have a recipe for the intermediate home cheese maker for making your own triple cream cheese.