The following microwave recipe was tested in an 800-watt oven. Cooking times will vary from one manufacturer's product to a another, depending on power and size configuration; therefore, it is imperative to refer to the instructions that accompany the appliance and to treat the times given in this recipe simply as guidelines.

　　Can be prepared in 45 minutes or less.

Ingredients

　　1/3 cup vegetable oil or rendered fat such as leftover goose fat

　　1/2 cup bread flour

　　In a 1-quart microwave-safe measuring cup or soufflé dish whisk together vegetable oil or rendered fat and flour until combined well. Microwave roux, uncovered, at high power (100%), whisking at 2-minute intervals, 8 minutes. If roux is not the dark reddish-brown color of chestnut shells, microwave at high power, whisking and checking color at 1-minute intervals, until roux reaches desired color. Roux may be made 1 week ahead, cooled completely, and chilled, covered. Reheat roux before using.