I am looking at the lyrics of お握りはどこかしら to help with Japanese recognition; the song is fast, but by deciphering the lyrics I can better recognize what is being said and keep up with the lyrics.
Thus far the song is very informal, but I am confused by this line:
お母さんはもういないし、おうちに食べ物一つもないし…
The use of "一つ" here. I know it says "My mom is not here anymore (she left for [work]) and there is not a single piece of food in our house."
But is there anything grammatical about the use of 一つ here?