With a crisp sesame candy shell and tender satsumaimo inside, this daigaku imo recipe shows you how to make Japanese candied sweet potatoes the street‑food way using a glossy rice‑syrup glaze. Enjoy it with tea as a snack or as a sweet side for a Japanese meal, with step photos and video to guide you.
Trim the ends off the 450 grams Japanese sweet potatoes and cut them rangiri by cutting off a chunk at a 45-degree angle from one end and then turning it 90 degrees and cutting another at a 45-degree angle. Repeat until you've cut all of the tubers into pieces that are roughly the same size and thickness.
450 grams Japanese sweet potatoes
Soak the cut pieces in cold water to keep them from oxidizing.
Preheat a pot with 2 inches of Vegetable oil to 340°F or 170°C.
Vegetable oil
Rinse and drain the sweet potato pieces and then put them in a frying pan along with the ¼ cup water. Cover with a lid and steam over medium-high heat until almost no boiling water remains.
¼ cup water
Open the lid, let any remaining water boil off, and then transfer the sweet potatoes into the hot oil.
Fry these until they're golden brown (about 5 minutes), turning them over regularly to ensure they brown evenly.
When the sweet potatoes are almost done frying, add the ¼ cup brown rice syrup and 20 grams evaporated cane sugar to the pan you used for steaming and start heating the mixture to dissolve the sugar.
¼ cup brown rice syrup, 20 grams evaporated cane sugar
Transfer the fried pieces directly from the oil into the glaze and toss them around in the syrup to coat them evenly. If the mixture has gotten too sticky to glaze, you can add a spoonful of water to loosen it up. Add the 2 teaspoons black sesame seeds and toss to distribute evenly.