A soufflé’s appearance and consistency are strongly affected by the oven temperature. At temperatures above 400ºF/200ºC, the mix rises the fastest, and the surface can brown while the interior is still moist and creamy. At 325 to 350ºF/160 to 180ºC, the rising is more modest, and surface browning coincides with a firming of the interior. A slow oven may coagulate the surfaces so gradually that the expanding mix spills out of its dish rather than rising vertically. Doneness can be determined by probing the interior with a toothpick, and is a matter of taste; some people like a creamy interior that still clings to the toothpick, others prefer a more fully cooked consistency, which clings to itself and leaves the toothpick clean.