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.
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."