Usage patterns
〈物〉に小麦粉をまぶすto coat something with flour
I coated the chicken with flour before frying it.
小麦粉をふるうto sift flour
I sift the flour before making the cake.
小麦粉を水で溶くto dissolve flour in water
I dissolved flour in water to make the batter.
〈物〉に小麦粉を加えるto add flour to something
I added flour to the soup to thicken it.