A roughened or speckled surface imparted to glass or metal.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "frosting" in a sentence
"This frosting is the kind of frosting that won't overwhelm a cupcake because it's plain and not too sweet and I didn't want to take away from the taste of the cake."
"Today I brought fudge marble cupcakes to the office, and the frosting is a dusty rose color with purple sprinkles."
"The light, fluffy sweetness of the frosting is a perfect contrast to the moist, spicy cupcakes."