An ice cream van was on site at Peterborough City Hospital at around 12pm - and queues were quick to form as staff claimed their free treat.
A pizza stall was also set up near the entrance to the emergency department.
A spokesperson for North West Anglia NHS Foundation Trust said: "We are treating our staff across all hospital sites today to a free ice cream as a thank you for their efforts.
"The pizza stall is an added extra where staff can buy a pizza for their lunch if they wish.
"It’s already proving popular with our staff and we hope it gives them a chance to take a break from their roles to grab a treat."
A fruit and vegetable stall was set up outside the hospital last year and remains in place, selling fresh, seasonal produce to staff and patients.