The foodbank charity the Trussell Trust has written to the Prime Minister to launch an inquiry into why are people are turning to them, as demand continues to grow.
It has described the problem of food poverty as "scandalous", and warns some foodbank recipients are so poor they return produce that needs cooking as they cannot afford the electricity to heat it up.
The UK Government says there is no evidence that rising foodbank use is linked to welfare reform.
– UK Government spokesman
We have taken action to help families with the cost of living, including increasing the tax-free personal allowance to £10,000 which will save a typical taxpayer over £700, freezing council tax for five years and freezing fuel duty.
The benefits system supports millions of people who are on low incomes or unemployed and there is no robust evidence that welfare reforms are linked to increased use of foodbanks.
More than twice the number of people have visited foodbanks in Wales this year compared to last.
The Trussell Trust says in the six months to September, 32,500 people in Wales received three days of emergency food from its foodbanks - 11,000 were children.
That compares to 12,377 in the same period last year.
The charity says that UK hunger is getting worse and the charity is calling for a public inquiry into the causes of UK food poverty and the consequent surge in foodbank usage.
Chris Mould, Executive Chairman of The Trussell Trust, said: "The level of food poverty in the UK is not acceptable. We said in April the increasing numbers of people turning to foodbanks should be a wake-up call to the nation, but there has been no policy response."
"As a nation we need to accept that something is wrong and that we need to act now to stop UK hunger getting worse."
The number of people using foodbanks in Wales has doubled in the past year alone.
One manager of a foodbank has told ITV News that they can't cope with demand and often see queues around the corner.
With more people facing unemployment and cuts to benefits, it is feared the demand is only going to increase.
Ian Purcell from Cardiff Foodbank describes the increased demand for services in Wales.
He says that people from all walks of society are coming forward seeking help from the foodbank.
Pamela receives food from The Trussell Trust foodbanks, she says without them she would have to borrow money and it would be "chaos."
– Chris Mould, Executive Chairman of the Trussell Trust
We're seeing people from all breaks, mums who are going hungry to feed their children, people whose benefits have been delayed and people who are struggling to find enough work. It's shocking that people are going hungry in 21st century Britain.
The number of people turning to foodbanks has more than doubled in the past 12 months.
35,919 people received a minimum of three days emergency food from Trussell Trust foodbanks in Wales in 2012-13, compared to 16,204 in 2011-12.
35 percent of those helped were children.
The charity puts the increase down to the rising cost of living, static incomes, changes to benefits, underemployment and unemployment.
In Cardiff alone 53 tonnes of food was provided to more than 5,000 people.
The Trussell Trust says it has seen a 55 percent increase in the number of foodbanks launched in Wales since April 2012 but has seen a 120 percent increase in numbers of people given emergency food.