Bowl with green olives, leaves, and green garnish
Food - Drink
How To Stop The White Film From Forming In A Jar Of Olives
The white film that sometimes forms in open jars of olives isn't dangerous to consume, and it's actually made of good bacteria that can benefit your gut health.
However, the film doesn't look appealing, and if you'd prefer not to deal with it, just pour some vinegar over the top of a new jar of olives to prevent the film from forming.
If the film has already formed, the vinegar won't dissolve it. You’ll have to scoop it out with a spoon, or pour out all of the brine and rinse the white spots off your olives.
Once your olives are free of the bacteria, you can return them to the jar and make your own brine to refill it. A simple mixture of water and salt will do.
You can also add a teaspoon of vinegar to the jar after removing the film. Vinegar is highly acidic and will halt the fermentation process, preventing the film from forming again.