If it has bean paste (or another paste) in it, technically it's 羊羹. If it's clear, it's
➡️ Precise recipes in my private notes
There's regular, firm 羊羹, the much softer 水羊羹 and then, for special taste, the 葛流し羊羹. The latter has a very satisfying texture!
For one 流し器:
Boil 寒天 with water, add sugar, 水飴 and, once dissolved, こし餡. Bring to a boil, then strain. Mix water and 葛, and add the mixture to the somewhat cooled main mix. (Some other recipes take some main mix into the 葛 mix, and then add everything back to the MM). Cook on medium heat for 2-3' until the opaqueness has gone. Chill in water bath to 45°, stirring, then pour off. Can be fridged.
I find this recipe just a tad too soft.
Same as for the 葛羊羹. You can use white bean paste, and then add some colour and flavour. The original recipe adds 7 gr 抹茶 (which I find too much, I'd use 5); but for tea ceremony a tea flavoured sweet doesn't make much sense. You can cut it nicely with a nylon string, though:
The base recipe is:
This makes it a bit grainy from the lotus root pieces, which I guess some people appreciate. However, I prefer this way:
Cook agar for 2' in juice, then add sugar and dissolve. Add pulp, bring to a boil. Sieve into 流し器. Add some thin layer of pulp on top. (Maybe you need to let it cool down a little bit before adding it so it doesn't sink down.)
One way of serving 水羊羹 in summer is to pour it into a bamboo tube and seal it with a bamboo leaf. Becaus the vacuum should keep the jellied 羊羹 in, to eat you pierce a small hole in the back of the tube, wiggle the 羊羹 onto the leaf and eat it from there. It's a lot of fun! I had two from 亀屋良長 (classic 羊羹 and a citrus-flavoured jelly, of which I preferred the former).
There's also the sad affair of the freezable 水饅頭. Because it doesn't use 葛, it's very easy to make and tastes very simple. I'm sure there are ways to make something out of them, but both the TT and 金塚 recipes didn't do it for me:
For 4:
Cook until translucent, then pour 70% into moulds, add inset (candied fruit for example; or 金塚's 味醂-steeped cherry tomato; or just soft 白あん) and top off. Their are slightly more interesting when half-frozen; but essentially just tasteless jelly shots.