quick-desserts
Japanese Sweet Potato Creme Brulee
Silky Japanese sweet potato creme brulee with caramelized sugar top. Easy 30-minute dessert that feels fancy but bakes beautifully.
A Fusion Moment That Changed My Dessert Game
I first made this at a dinner party when my neighbor brought me gorgeous Japanese sweet potatoes from her garden, and I absolutely had to do something special with them. Traditional creme brulee is my comfort zone, but swirling in that silky sweet potato puree felt like discovering a completely new dessert—one that’s equally impressive but somehow easier than you’d think.
My Best Advice
- Use a fine-mesh sieve after mixing the custard. Japanese sweet potatoes can be fibrous, and straining ensures you get that restaurant-smooth texture that makes this feel fancy.
- Don’t skip the water bath—it gently cooks the custard so the edges set while the center stays creamy. This is what separates homemade creme brulee from scrambled eggs.
- Torch the sugar at the very last minute before serving. If you caramelize more than 10 minutes ahead, the sugar can soften from the custard’s moisture. Perfect timing makes that satisfying crack when you tap the spoon.
Variations
- Miso Caramel Version: Stir 1 teaspoon white miso paste into the custard for a subtle umami depth that makes the sweet potato flavor even more complex.
- Bourbon Sweet Potato: Replace vanilla extract with 1 tablespoon bourbon whiskey for a richer, warming flavor that pairs beautifully with the autumn notes in sweet potato.
- Matcha Dusted Brulee: Before torching, dust a light layer of matcha powder over the demerara sugar for a earthy Japanese tea flavor that complements the sweet potato.
If you love Japanese-inspired desserts, you’ll also adore my matcha creme brulee which uses the same silky custard technique.
Ingredients
For the Creme Brulee
For Caramelizing
Instructions
- 1
Cook the Sweet Potato
Cut peeled Japanese sweet potato into small cubes and boil in salted water for 8-10 minutes until very tender. Drain completely and cool for 5 minutes, then puree until completely smooth using an immersion blender or food processor.
- 2
Heat Cream Base
Combine heavy cream and milk in a saucepan over medium heat. Stir occasionally until steaming but not boiling, about 5 minutes. Remove from heat.
- 3
Temper the Eggs
Whisk egg yolks with granulated sugar until pale and ribbon-like, about 2 minutes. Slowly add the hot cream mixture while whisking constantly to avoid scrambling the eggs.
- 4
Combine Custard
Stir the sweet potato puree into the custard mixture until completely smooth. Add vanilla extract and sea salt, then strain through a fine-mesh sieve to remove any lumps.
- 5
Fill Ramekins
Divide custard evenly among six 6-ounce ramekins. Place ramekins in a large baking dish and add hot water until it reaches halfway up the sides of the ramekins.
- 6
Bake Water Bath
Bake at 325°F (165°C) for 25-30 minutes until custards are set at edges but still slightly jiggly in the center. Remove from water bath and refrigerate for at least 2 hours before serving.
- 7
Caramelize Tops
Sprinkle 1/2 tablespoon demerara sugar evenly over each cold custard. Using a kitchen torch, wave the flame over the sugar until it melts and turns deep amber, about 2 minutes per ramekin.
- 8
Serve
Serve immediately while the sugar shell is warm and crackly. The contrast between the caramelized top and cool, creamy sweet potato custard is absolutely magical.
Nutrition Information
Per serving (serves 6). Values are approximate.
| Calories | 285 calories |
| Total Fat | 22g |
| Saturated Fat | 13g |
| Carbohydrates | 18g |
| Sugar | 14g |
| Protein | 4g |
| Sodium | 95mg |
| Fiber | 1g |
* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs. Nutritional information is an estimate and may vary.
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Frequently Asked Questions
Can I make this ahead of time?
Yes! Bake the custards up to 2 days ahead and refrigerate without the caramelized sugar top. Just torch the sugar 10 minutes before serving. This makes it perfect for entertaining since you can prep most of the work earlier.
What if I don't have a kitchen torch?
You can broil the ramekins on a high rack for 2-3 minutes, watching closely so the sugar caramelizes without the custard cooking further. It won't be quite as dramatic, but still delicious. A torch gives the best control, though.
Can I use regular sweet potatoes instead?
Regular orange sweet potatoes work, but Japanese sweet potatoes have a creamier, slightly sweeter flavor that's really special in this dessert. If you substitute, reduce sugar slightly since regular varieties can be earthier. I honestly recommend hunting for Japanese ones—they're worth the extra effort.
Reader Reviews
Based on 103 reviews
