Check your cabinets and pantry. You might have a forgotten onion that has sprouted.Anonymous wrote:My house, inexplicably, smells like green onions. I haven't eaten them, cooked with them, bought them in months and when I walked in today it's all I could smell. (I'm not pregnant... I'm sure). Is there a mold or (ugh) vermin or something that could make this happen? 100+ year old stand alone home in the city.