Ankake — Thickened Sauce Technique
Japan — Chinese-influenced technique fully integrated into Japanese home and restaurant cooking
Ankake (あんかけ) is the Japanese technique of thickening a sauce, broth, or dashi with katakuriko (potato starch) or cornstarch to create a glossy, coating, gently clinging sauce that keeps food warm longer than unthickened broth. The technique is used across categories: ankake tofu (silken tofu in thickened dashi-soy-ginger sauce); ankake udon (hot udon in thick, warming ankake broth — popular in Kyoto in winter); ankake chahan (fried rice covered in a silky thickened sauce); and in Chinese-influenced Japanese dishes like ankake yakisoba and sweet-sour pork. The starch gelatinises at approximately 65–70°C, creating a sauce that coats without pooling, retains heat exceptionally well, and has a characteristic 'glossy' visual appearance. The key failure mode is an uneven texture ('nameless' texture) from improper starch slurry addition.