blancmange
Concise Oxford English Dictionary © 2008 Oxford University Press:
blancmange /bləˈmɒnʒ, -ˈmɑːnʒ/
▶noun Brit. a sweet opaque gelatinous dessert made with flavoured cornflour and milk.
– origin ME blancmanger: from OFr. blanc mangier, from blanc ‘white’ + mangier ‘eat’.
'blancmange' also found in these Oxford entries:

