Kerry Trebilcock, 21, claims that she has consumed around 4,000 sponges in total as well as 100 bars of soap.
The dental nurse from Mylor, Cornwall has also said she likes to eat them with condiments - often hot relish, mustard, barbecue sauce, jam, honey or tomato ketchup - or dip them in tea or hot chocolate.
Trebilcock's cravings are down to an eating disorder - she has been diagnosed by her doctor with pica, which causes abnormal appetite for non-nutritive items.
She told The Sun: "One day, I will beat this and be able to have a shower or do the washing-up without feeling hungry."
Recalling the first time she ate a sponge, she continued: "After one dinner where I ate a double helping of lasagne and a tub of ice cream, I still felt hungry. To distract myself, I decided to wash the dishes.
"I took out a new sponge from a packet and had an overwhelming desire to eat it. I sat down with a glass of water and chewed the sponge until it was gone. It tasted of nothing but I found eating it enjoyable."
Despite her condition, Trebilcock weighs 8 stone. She prefers fruit-flavoured sponges, particularly lemon and lime.
She has been working to fight the disorder by seeking counselling, eating vitamins and chewing on sweets.
"I still have a one-inch square of sponge and three teaspoons of organic soap with each meal," Trebilcock added. "But I am making progress and speak to other sufferers of pica on internet forums."
Last year, it was reported that a pregnant woman craved furniture polish while another person was addicted to eating sofas.