(しるこ)

おしるこ
noun
sweet red bean soup with mochi
food
1. sweet red bean soup; oshiruko
A traditional Japanese sweet soup made from sweetened azuki beans, typically served hot with mochi (rice cakes) or shiratama dango (rice flour dumplings). A classic winter comfort food.
(ふゆ)汁粉(しるこ)おいしい。
Oshiruko is delicious in winter.
(もち)()汁粉(しるこ)()べた
I ate oshiruko with mochi in it.
On the way back from the New Year's shrine visit, I ordered oshiruko at a traditional sweets shop.

The お is an honorific prefix; the base form is 汁粉(しるこ), but お汁粉(しるこ) is the standard spoken form. In the Kanto region (Tokyo), お汁粉(しるこ) refers to the smooth-paste (strained) version, while 善哉(ぜんざい) sometimes refers to the version with whole beans. In Kansai (Osaka), the naming conventions differ. Commonly served at 甘味処(かんみどころ) (traditional sweets shops) and during 正月(しょうがつ) (New Year). Often associated with warming up in cold weather.