In cooking what measurement is a knob of ginger?

Answer 1

An approximate measurement, generally around 2 tablespoons. When a recipe calls for a knob of butter, it is intended that one can take some liberty, so don't worry about adding an exact amount.

Answer 2

Ginger is a root vegetable with sections sticking out like arms all over it. A knob would be one of the "arms" sticking out of the main body. Depending on the taste you are going for, you might want a large knob or small knob. The knob should be peeled and then either chopped, grated, or sliced.