The foodbank at Gateway Church saw its busiest day last week - handing out enough food for 64 people.
Janet Crownshaw, foodbank co-ordinator and a church trustee, said the shelves were almost empty after 23 food vouchers were received.
She said it was the busiest day since they opened ten weeks ago.
"There is a broad range of people who come; those who have lost their jobs, that have had their benefits cut, single mums who just don't have enough money to feed their children and elderly people who are struggling. Since the 'bedroom tax' came into effect, it's costing people their food.
"Last Thursday the shelves were practically empty apart from a bit of pasta and some little treats and sweets."
The foodbank, at the church on Mottram Street, is open every Thursday from 11am to 1pm where people hand over vouchers, previously awarded after an initial interview, in exchange for food which should last for three days.
"Many have got difficult stories to tell us. It's an eye-opener and I only think it's going to get worse as the year goes on.
"There is a big need, especially in Barnsley, and I'm sure there will be more people coming in future."
Janet said most people who attended the foodbank were embarrassed at having to admit they couldn't afford food, but were grateful for the help.
She said they are desperate for new stock to be able to continue, especially tinned food such as tomatoes, carrots, peas, potatoes, tuna, rice pudding, and fruit; packet food such as custard and rice; tea, coffee, sugar, powdered milk and drinking chocolate and cereals.
"It is very worrying for the members and volunteers. We don't want to have to put a notice up saying 'sorry, foodbank closed'.
"We hope to help everyone in crisis and in ten weeks we've given out 127 vouchers which has fed 322 people."
They would also appreciate packets of custard and rice, and items such as tea, coffee, sugar, drinking chocolate, powdered milk and cereals.
