Thieves have trashed the Marysville Patisserie in Malvern and stolen donations collected for CFA volunteers.

Ashraf Doos and his family temporarily moved the bakery to Malvern after their shop in Marysville was destroyed on Black Saturday.

He arrived this morning to find food and Christmas orders dumped on the floor.

The thieves also took money from the till, and a jar of donations for the Marysville CFA.

Mr Doos says the shop has been ransacked, and thousands of dollars worth of food has been wasted.

"You wouldn't believe the mess these guys left, I have so many orders for the Christmas cakes - I put them in the cool room and all the cakes are on the floor," he said.

"I do my own fudge, I make a lot of fudge for Christmas and it's all over the floor, there's just mess everywhere. They went through everything."