Preheat the oven to 320°F / 160°C (285°F convection / 140°C fan).
In a mixing bowl, whisk 6 large egg yolks with ½ teaspoon salt, ¼ teaspoon white pepper, and ⅛ teaspoon nutmeg until smooth. Slowly whisk in 1 teaspoon cognac and 1 ¾ cups (450 ml) heavy cream until fully combined.
Divide 10 oz (290 g) crab meat between 4 ramekins, then pour the egg and cream mixture evenly over the crab, filling each ramekin about three-quarters full.
Place the ramekins in a deep baking dish, then pour hot water into the dish until it reaches halfway up the sides of the ramekins.
Bake for 35–40 minutes, until the custard is set around the edges but still slightly jiggly in the center.
Remove the ramekins from the water bath, let them cool slightly on a cooling rack, then refrigerate for at least 8 hours, or until fully set.
Before serving, sprinkle 1 tablespoon light brown sugar over each chilled custard, then caramelize the sugar with a culinary torch until golden brown and crisp.
Let the sugar topping cool for a few minutes until it hardens, then top each crab brulee with a little extra crab meat and finely chopped chives. Serve immediately.
Notes
Use Good Quality Crab Meat: I like using lump crab meat because it stays tender and gives the custard a richer seafood flavor.Do Not Overbake: The centers should still have a slight wobble when they come out of the oven so the custard stays silky after chilling.Torch the Sugar Evenly: I move the torch slowly in circles so the topping caramelizes evenly without burning in spots.Keep It Chilled Until Serving: I like to keep the ramekins cold until the last minute so the contrast between the cold custard and warm crisp topping stays perfect.