Method and apparatus cooling a hydrocarbon stream such as natural gas. An initial hydrocarbon stream (8) is passed through a first separator (16) to provide an initial overhead stream (110) and a mixed hydrocarbon feed stream (10). The initial overhead stream (110) is cooled to provide a cooled hydrocarbon stream (120) such as LNG, and at least a Cl overhead stream (20) and one or more C2, C3 and C4 overhead streams (40, 50, 60) are separated from the mixed hydrocarbon feed stream. At least a fraction (45, 55, 65) of at least one of the group comprising: the C2 overhead stream (40), the C3 overhead stream (50) and the C4 overhead stream (60); is cooled with the C1 overhead stream (20) to provide a cooled stream (70), which is further cooled against at least a fraction of the cooled, preferably liquefied, hydrocarbon stream (120) to provide an at least partly liquefied cooled stream (71).