Yield: 8 servings. Oven temperature: 325 degrees F
Heavy cream2 cups Light brown sugar1/4 cup Granulated sugar1/4 cup plus 4 tsp Egg yolks, large8 Pure Vanilla extract1/2 tsp Ground cinnamon1/4 tsp Grated nutmeg1/8 tsp Cooked sweet potatoes, mashed1 cup
Preheat the oven.Arrange 8 (1/2-cup) ramekins or custard cups in a large metal baking pan. In a medium saucepan, heat the heavy cream.Add the brown sugar and 1/4 cup of the granulated sugar.Bring to a bare simmer over medium-high heat, stirring to dissolve the sugar.Remove from the heat.
In a medium bowl, whisk the eggs until frothy and lemon-colored.Slowly add 3/4 cup of the hot cream, whisking constantly.Add the egg mixture to the remaining hot cream, and whisk.Add the vanilla, cinnamon, nutmeg, and potatoes, and whisk until smooth.Strain through a fine mesh strainer into a large bowl.Divide among the prepared custard cups.
Add enough hot water to come halfway up the sides of the cups.Bake until the custards are just set in the center but not stiff, 45 minutes to 55 minutes.Remove from the oven and refrigerate until well chilled, at least 3 hours or overnight.
Sprinkle each custard with 1/2 teaspoon of the remaining sugar.Using a blow torch, caramelize the sugar.(Alternately, preheat the broiler, and broil until the sugar melts and caramelizes, watching closely to avoid burning and rotating the cups, 1 to 2 minutes.)Place on small dessert plates and serve.