Leeza Pearson was out of fruit and vegetables one day last week, so she tucked a pack of Oreos in her daughter Natalee’s lunch and sent her off to school at the Children’s Academy in Aurora, Colorado.

Pearson said she was stunned when her 4-year-old came home later in the day with the cookies untouched and a sternly worded note from the school.

“Dear Parents, it is very important that all students have a nutritious lunch. This is a public school setting and all children are required to have a fruit, a vegetable and a healthy snack from home, along with a milk. If they have potatoes, the child will also need bread to go along with it. Lunchables, chips, fruit snacks, and peanut butter are not considered to be a healthy snack. This is a very important part of our program and we need everyone’s participation,” read the note, provided to ABC News by Pearson.