This word uses the kun'yomi reading for the first kanji and the on'yomi readings for the second two. You haven't learned this reading for 工 yet, so here's a mnemonic to help you:
You want your sugar sculptures to be made into cookies (く)! Cookies are your other favorite snack, so having a cookie that's really just entirely made of sugar is the absolute best.
Also, watch out for the rendaku on 細, it's easy to miss if you're focusing on remembering this new on'yomi reading.
My father is a master of sugar sculptures.
Have you ever made sugar sculptures?
Apparently, the sugar goldfish is similar to real goldfish in shape and taste.