汤种 (湯種) tāngzhǒng

tāngzhǒng noun water roux (aka tangzhong)
Domain: Modern Chinese 现代汉语 , Subdomain: Food and Drink
Notes: A gelatinous paste made by heating a mixture of flour and water, used in breadmaking to produce a softer, fluffier loaf; loanword from Japanese 湯種 yudane (CC-CEDICT '湯種')