For 'Yu-yakko' described as 'superb' in 'A Hundred Delicacies of Tofu,' a cookbook dating from the Edo period, kudzuyu is used instead of water, which maintains the warmth of tofu until it is eaten and gives one the chance to enjoy the pairing of tofu and Kudzuyu.
なお、江戸時代の料理本「豆腐百珍」に「絶品」とある「湯やっこ」は、湯豆腐の湯のかわりに葛湯を使い、食するまで冷めにくく、豆腐と葛湯の相性を楽しむもの。