Temmie Flakes are a consumable item sold at the Tem Shop. The Temmie Shopkeeper sells four "varieties" of this item, although they are all identical once purchased. On the Genocide Route, "Premiem" Temmie Flakes replace the option to pay for the Temmie Shopkeeper's college education, preventing the protagonist from obtaining the Temmie Armor.
- Giving Temmie Flakes to a Temmie in a battle results in her becoming spareable.
- If the protagonist refuses to give her Temmie Flakes after selecting the option in the ACT menu, Temmie becomes aggressive and exclaims "can't blame a BARK for tryin'...". The sound effect grandpatemi plays during this interaction.
- The official Temmie plush from Fangamer contains three Temmie Flakes, all of different colors. They are pieces of construction paper with a picture of Temmie on them.