The invention relates to a process of compacting a microporous fat powder, notably a microporous fat powder that can suitably be used as an oil structuring agent. The process comprises feeding said fat powder into the feed zone of an extruder having a forwarding screw and a barrel within which the forwarding screw is centrally positioned; rotating the forwarding screw to advance the fat powder feed through a compacting zone of the extruder, where the barrel comprises a plurality of venting openings having a shorter dimension that exceeds the volume weighted average diameter of the fat powder feed and that is less than 10 mm; and expelling the compacted fat powder from the extruder; wherein the temperature of the fat powder during passage through the extruder is maintained below 40° C. and wherein the compaction factor achieved exceeds 1.5.