As a result, Arbor Grove said it would be banning "cupcakes, lolly bags or other unhealthy options for students to share with their classmates" for birthdays from Monday.
"Should a student arrive with such items, teachers will no longer hand out items during school time, instead returning them with the student at the end of the day," the letter read.
The school said while it acknowledged its decree "may not be a universally popular decision" it would prevent several problems at the school.
It would "avoid the risk of a child suffering a potentially life-threatening health issue", be "respectful to the culture diversity" of the school, as well as supporting the WA education department's policy on "healthy food choices for students".
However, not every parent saw it that way, blasting the decision as "incredibly offensive" after it was shared on the Arbor Grove's Parents and Citizens Association Facebook page.
News.com.au has contacted the school and the WA department of education for comment.
"Why didn't they ask the parents to vote? Out of a school over 500 students, let's say 125 are of cultural difference. What ever happened to majority rules. Man I'm pissed," one mum fumed.
"Absolutely disgusting. There are a lot more important issues this school should be concerned about & trying to fix NOT STOPPING OUR KIDS FROM BEING KIDS," one person commented.
"What an extremely un-Australian thing to do," another posted, while one mum added: "Don't even get me started … so it's OK to sell soft drinks at a school disco for fundraising but not OK to bring a cupcake to school for a birthday."
Meanwhile one parents suggested that students be allowed to bring "non-edible items" to celebrate their birthdays instead.
"Like balls, coloured pencils crazy straws, you get the idea?? This would mean that no one with allergies would be affected and no child would be given unhealthy food," she wrote.
"It would be a very sad day when a child is not allowed to celebrate their birthday at school."