More fruit and vegetables will be on the menu in primary schools and fried food is being cut as part of healthy eating plans in Wales.
Sugary desserts will also be scaled down as part of Welsh government plans to improve the nutritional balance of school meals.
A consultation on new guidance will also look at portion sizes, a maximum and minimum recommended amount of red meat, reclassifying fruit juice as "not a piece of fruit", as well as banning fizzy drinks.
Public Health Wales (PHW) welcomed the proposals, while one dietitian said the changes were "really important" because some children "fall short" of having enough fibre and vitamins.
Currently one in four reception-aged children in Wales are categorised as overweight or obese.
The Welsh government said evidence showed children were eating too much sugar and not enough fruit, vegetables and wholegrains.
