Japanese Sweet Potato Crème Brûlée (Printable)

A silky custard fusion featuring Japanese sweet potato with a crisp caramelized sugar topping.

# What You’ll Need:

→ Sweet Potato Custard

01 - 1 large Japanese sweet potato (about 9 oz), peeled and cubed
02 - 1 cup heavy cream
03 - 1/2 cup whole milk
04 - 4 large egg yolks
05 - 1/4 cup granulated sugar
06 - 1/4 teaspoon vanilla extract
07 - Pinch of salt

→ For the Caramelized Top

08 - 3–4 tablespoons granulated sugar (for brûlée)

# How To Make It:

01 - Preheat your oven to 300°F. Place a kettle of water on to boil for the water bath.
02 - Steam or boil the sweet potato cubes until very tender, about 15 minutes. Drain and let cool slightly.
03 - In a blender or food processor, blend the sweet potato with heavy cream and milk until completely smooth.
04 - In a mixing bowl, whisk together egg yolks, sugar, vanilla, and salt until pale and smooth.
05 - Slowly pour the sweet potato mixture into the egg yolk mixture, whisking continuously.
06 - Strain the mixture through a fine mesh sieve into a clean bowl to ensure a smooth custard.
07 - Divide custard evenly among 4 ramekins and place them in a deep baking pan.
08 - Pour hot water into the pan to reach halfway up the sides of the ramekins.
09 - Carefully transfer to the oven and bake for 30–35 minutes, or until the custard is just set but still slightly wobbly in the center.
10 - Remove ramekins from the water bath and let cool to room temperature, then refrigerate for at least 2 hours or until chilled.
11 - Just before serving, sprinkle 1 tablespoon of sugar over each custard. Use a kitchen torch to caramelize the sugar until golden and crisp (or briefly broil under the oven grill, watching closely).
12 - Allow the brûlée to rest for 3 minutes before serving, so the caramel hardens.

# Expert Tips:

01 -
  • The natural sweetness of Japanese sweet potato means less sugar is needed for the custard base
  • You get the satisfaction of cracking through caramelized sugar into impossibly smooth cream
  • It looks fancy but comes together faster than you would expect
02 -
  • The water bath temperature matters more than you think—too hot and the custard will curdle, too cool and it will not set
  • Straining the custard through a sieve is not optional if you want that silky professional texture
  • The custard must be completely cold before applying the sugar topping or it will melt unevenly
03 -
  • Use a kitchen torch instead of the broiler for more control over the caramelization
  • Japanese sweet potatoes vary in sweetness—taste the puree before adding sugar to the custard
  • If you cannot find Japanese sweet potatoes, purple-fleshed Stokes Sweet potatoes are a good substitute

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