It’s in the red bag. Or the blue bag. It says “All-Purpose” or “Plain” or “Unbleached.” It never says “Self-Rising.” Know your labels.
If you see a bag that just says “Flour,” run. That’s weird. That’s flour from a horror movie. Stick to the good stuff.
Pro tip: Store it in a cool, dry place. Flour is a drama queen—it hates humidity. Keep it happy, and it will keep your cakes happy.