Countdown is recalling Select Fruit & Seeds Muesli because allergens were not declared.
The muesli was sold in Countdown, Fresh Choice and SuperValue stores nationwide and applied to a batch of the product that has the best-before date of May 25, 2018.
Countdown said the muesli may contain yogurt-coated sultanas and chocolate chips, which are not part of the declared mix, and peanuts, which are declared as "may be present".
The yogurt coating on the sultanas contains milk, which is an undeclared allergen and may pose a risk to customers with a milk allergy.
People who are not allergic to milk products or peanuts can continue to eat the muesli, Countdown said.
Anyone can receive a full refund by returning the muesli to a store or ring 0800 404040 for more information.