One cup of diced onions equals how many dry onion flakes?

There is no direct conversion between diced onions and dried onion flakes as their densities and moisture contents differ significantly. However, a general approximation can be made based on the assumption that 1 cup of diced onions weighs approximately 150 grams, and 1 tablespoon of dried onion flakes weighs roughly 2 grams.

Using this approximation, you would need around 75 tablespoons (or 18 teaspoons) of dried onion flakes to equal the volume of 1 cup of diced onions. However, it's essential to note that the taste and texture of dried onion flakes cannot entirely replicate those of fresh diced onions, so the substitution should be based on the recipe and desired preferences.