Bakers Delight has caused outrage by marketing a bread roll covered in M&Ms as a lunchbox snack for kids.

The popular bakery launched a back to school promotion in Australia, with a billboard ad featuring three products, including a white roll with bacon and cheese, a cheese and Vegemite scroll and four white finger buns with M&Ms sprinkled on top.

Below the rolls were the words "School lunches? Problem solved."

The promotion is also running in New Zealand, with the website featuring the rolls as a "lunchbox or after school snack".

The promotion received significant backlash, with one complainant to the Ad Standards Board saying "Advertising of lollies on bread for school lunches is appalling. Lunch and healthy food choices is challenging enough for most families and to have this as an acceptable choice is unfathomable.

"A company that promotes bread as sugar free this is a disgrace. This is only contributing to the childhood diabetes and obesity epidemic that we have in Australia."