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Imo Yokan (Sweet Potato Jelly Bars)
Makes 1 container (about 14 × 11 cm, 8 pieces) · About 1 hr 40 min (1 hr of this is just chilling)
Boil and mash sweet potatoes, mix in sugar, pack into a container and chill until firm. No agar is used.
① Peel and cut→② Boil→③ Mash and knead→④ Pack into a container→⑤ Chill and cut
What to buy
Vegetables
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How to make it
1
Peel and cut
- Wash the sweet potatoes and cut off both ends on a cutting board
- Cut into rounds 1.5 cm thick
- Put each round on the cutting board and cut off the skin thickly, about 3 mm (also remove the fibrous ring just inside the skin)
- Soak in a bowl of water for 10 minutes
How to tell it's doneAll cut surfaces are yellow, with no different-colored parts near the skin left.
2
Boil
- Drain the sweet potatoes, put them in a pot, and add enough water to cover
- Put over high heat, and when it boils, boil over medium heat for about 15 minutes
How to tell it's doneA bamboo skewer slides in easily.
3
Mash and knead
- Drain in a colander, throw away the water, and put the sweet potatoes back in the pot
- Mash them while hot with a masher (or a fork if you do not have one)
- Add 40 g sugar and a pinch of salt, and knead with a spatula over low heat
How to tell it's doneThere are no lumps, and it is stiff enough that a line drawn with the spatula stays.
Be carefulIt burns easily, so keep stirring. It can splatter, so keep your face away.
4
Pack into a container
- Line the storage container with plastic wrap
- Put in the mixture from step 3 while hot, and pack it in with no gaps, pressing with a spatula
- Put plastic wrap on top too, and press with your hands to make the top flat
How to tell it's doneThere are no gaps, and the top is flat.
5
Chill and cut
- When it has cooled enough to touch, chill in the fridge for 1 hour
- Take it out with the plastic wrap, put it on a cutting board, and cut into 8 pieces
ReadyThe corners do not crumble when cut. Keep in the fridge and eat within about 2 days.
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🔪 Cutting & cooking tips
If it didn't work out
It is dry and crumblyYou mashed it after it cooled in step 3. Mash while hot and knead well.
It falls apart when cutIt was not kneaded enough in step 3 and has too much water, or it was not chilled enough. Next time, knead until a line stays.
The color is darkYou did not soak it in water in step 1, or some skin was left. Peel the skin thickly.
It is not sweet enoughSweet potatoes differ in sweetness. Taste it in step 3 and add sugar 1 tsp at a time.
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