The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

Likely made with FLOUR. And coffee.
Money Heist Season 3, Episode 7

I lived below the Street of Flour.
Game of Thrones Season 3, Episode 10

Flour, lard, water, eggs, milk.
Game of Thrones Season 4, Episode 7

corn FLOUR, wheat starch,
The Big Bang Theory Season 5, Episode 24