Heat oven to 350 degrees. Cut brioche into 3/4-inch cubes. Spread on a 17-by-12-inch baking sheet; bake until dry and golden, 10 minutes. Transfer to a wire rack to cool.
Melt butter in a medium skillet over medium heat. When hot, add onion, celery, garlic, salt, and pepper. Cook, stirring occasionally, until onions are softened, 3 minutes. Add nutmeg, cayenne, cognac, and oyster liquor; cook until liquid is absorbed, 1 minute. Add oysters and cream; cook 30 seconds. Remove from heat.
In a large bowl, toss together brioche, oyster mixture, and parsley. Use for stuffing immediately. Note: If baking outside the turkey, spread in a buttered 9-by-13-inch baking pan. Bake until golden on top, about 20 minutes. Stir stuffing, and bake another 20 minutes.
This is the best stuffing EVER. I have been making it every other Thanksgiving for years, and this Thanksgiving when it was time to impress my future mother-in-law, who loves oyster, this is what I made. She loved it! So, thanks Martha for helping me with this :-)
I have made this stuffing every year since 2004. This is the first dish that is empty during the holidays. I am now responsible for the stuffing at Thanksgiving as well as Christmas! This recipe has become a new family tradition!