As a non-native english speaker my search for recipes has lead me wondering what the hell is a “spanish onion” as some recipes call for. my understanding from googling is that it is a special variety of the basic yellow onion kind of like varieties like san marzano are for tomatoes or just another name for the ‘basic yellow onion.’
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Yes, a yellow onion and a Spanish onion are interchangeable. Are they the same thing? Unsure, but they are used as the same thing here in the states.
I think Spanish onions are just a varietal of onions, like Vidalia onions. They are a kind of sweet onion - basically a yellow onion grown in low-sulfur soil so it doesn’t have that pungency and is thus “sweet”.
