frosting

frosting /ˈfrɑːstɪŋ/ noun
plural frostings
frosting
/ˈfrɑːstɪŋ/
noun
plural frostings
Britannica Dictionary definition of FROSTING
[count]
1 
chiefly US : a sweet, creamy mixture that is used to cover cakes
— called also icing
2 
: a dull surface on metal or glass