Curry roux is a thickening agent used in Japanese-style curry dishes. It typically consists of a blend of flour, fat, and spices, which are cooked together to create a smooth paste. This roux is essential for achieving the rich, savory flavor and creamy texture characteristic of Japanese curry. Curry roux is available in various forms, including blocks, powders, and cubes, making it easy to use. It often contains a mix of spices such as cumin, turmeric, and coriander, along with additional ingredients like onion and garlic for enhanced flavor.