The TAG profiles clearly show that fat migration occurred, and at greater
levels in cookies made with higher amounts of fat. TAG found at higher
levels in palm oil than in cocoa butter (PLO, POO, POP and PLP) increased
in the chocolate chip after baking, indicating that palm oil migrated
from the cookie dough into the chip. In addition, TAG found at
higher levels in cocoa butter (SOS, POS) decreased in amount in the
chip after baking. Supplementary TAG analysis, not presented here,
showed increased SOS and POS levels in baked palm oil cookie, confirming
that the observed decrease in SOS and POS levels in the chocolate
chips was due to migration and not solely a result of dilution.
This indicates that palm oil migrated from the cookie into the chip at
the same time cocoa butter migrated out of the chip.