Wheat Flour
noun
Wheat powder is wheat flour.
むぎこ
This word uses the kun'yomi readings. Since you didn't learn that reading for 粉 with the kanji, here's a mnemonic to help you out. What sort of people like wheat flour the most? 子! 子 like wheat flour the most since it is both fun to eat and to play with. Silly 子, wheat flour is a food, not a toy.
今日久々に麦粉が入った袋を開けたら、緑色のクネクネした幼虫が大量発生していました。
Today I opened a bag of wheat flour for the first time in long time and found a bunch of green worms wriggling in it.