In a medium bowl, whisk together the egg yolks, heavy cream, dry sherry, lemon zest, Dijon mustard, cayenne pepper, and salt until well combined.
Divide the crab meat evenly among six ramekins. Pour the custard mixture over the crab meat, filling to about 3/4 full.
Place the ramekins in a baking dish. Pour hot water into the dish to come halfway up the sides of the ramekins. Bake in the preheated oven for 30-35 minutes or until the custards are set but still slightly wobbly in the center.
Remove the ramekins from the water bath and let them cool to room temperature. Then chill in the refrigerator for at least 2 hours.
Sprinkle sugar evenly over the tops of the chilled custards. Using a culinary blowtorch, melt the sugar until it forms a crisp, golden crust.
Allow the caramel to cool for a few minutes before serving the crab brulees immediately.
Recipe Video
Notes
For a unique twist, try adding finely chopped chives or parsley before baking for added color and flavor. The brulee can also be served with toasted baguette slices for a delightful contrast in textures.