The Department of Veterans Affairs has informed businesses that they'll face fines of up to $51,000 if caught tampering with the traditional Anzac biscuit recipe.
Individual sellers could be slapped with a $10,000 fine.
Under government regulations, a biscuit can't be sold as an 'Anzac biscuit' if it has additions like chocolate chips or almonds.
The warning comes part of a wider crackdown by the federal government and RSL on businesses exploiting the Anzac spirit for commercial gain.
So stick to the traditional recipe, which can be found on the Australian War Memorial website.