Light, Airy Cake Made With Eggs, Sugar and Flour
Puzzle 6 of Secondhand Treasures Pack
Question is: Light, Airy Cake Made With Eggs, Sugar and Flour
and the answer is: SPONGE
Word Meaning:
SPONGE — (countable) Any of various marine invertebrates of the phylum Porifera, that have a porous skeleton often of silica.
Definitions from Wiktionary.