It makes some pastries yellow (4)
I believe the answer is:
yolk
(Other definitions for yolk that I've seen before include "Part of a 7 Down" , "Yellow (as opposed to white?)" , "Food kept by white" , "Yellow part of an egg" , "Bird food" .)
I believe the answer is:
yolk
(Other definitions for yolk that I've seen before include "Part of a 7 Down" , "Yellow (as opposed to white?)" , "Food kept by white" , "Yellow part of an egg" , "Bird food" .)