Maize Kernels Heated in Butter Till They Expand
Puzzle 14 of Countdown to 2020 Piece of Cake Pack
Question is: Maize Kernels Heated in Butter Till They Expand
and the answer is: POPCORN
Word Meaning:
POPCORN — (chiefly uncountable) A snack food made from corn or maize kernels popped by dry heating.
Definitions from Wiktionary.