I was just searching for this information and pulled up this thread.
My daughter will be a sophomore next year and living off campus, completely cooking for herself.
She has a summer job and earned her own spending money, but I want to cover basic groceries for her. I decided to give her the same amount I'd spend if she were on the full meal plan at school. That works out to about $300 every 2 weeks or about $600 per month. That should be ample for basic groceries and things like toilet paper and dish soap.
She can supplement with meals out from her own earnings if she wants to eat out and she can use her summer earnings for the fancy personal care items she enjoys.
I found this source of information online that makes me feel this amount is reasonably generous.
https://educationdata.org/average-monthly-food-spend-college-student
Report Highlights.
The average cost of food per month for a college student is $672.
College students spend on average $410 a month eating off-campus.
Meals cooked at home average $263 a month when the cost of eating off-campus is included.
A campus meal plan averages $570 a month.
A vegan diet cooked exclusively at home averages $281 a month.
She is going to school in a medium cost of living location, where the average cost of groceries for a college kid is about $350 ( but I assume that doesn't include dining out).