Question: 1/2 onion equals how much onion powder?
Answer: As a substitute, use 1 teaspoon of onion powder or 1 tablespoon of dried onion flakes. Medium Onion: Produces about 1 cup of chopped onion. Use 1 tablespoon of onion powder or 3 tablespoons of dried onion flakes as a substitute. Large Onion: Produces about 1 1/2 cups of chopped onion.