Keeping infused oil safe
Fresh garlic and herbs can carry botulism spores from the soil. Under oil, they sit in a low-oxygen, low-acid, moist spot, and at room temperature the spores can grow and make a dangerous toxin. Keep homemade infused oil in the fridge.
Make it small, chill it, use it fast
Keep homemade flavored oil in the fridge and use it within a few days. Better still, strain out the solids and use it right away. Dried herbs carry far less moisture, which lowers the risk. Store-bought oils are made under controlled processes.
Test yourself
Questions from the interactive lesson, with the answer and the why.
Why is garlic in oil on the counter risky?
Low oxygen and low acid let spores grow. Spores grow where air is scarce and acid is low.
True or false: Heating garlic in oil for a few minutes makes it safe to keep on the counter for weeks.
False. Brief heat does not reliably kill spores. Keep homemade infused oil cold.
What went wrong? You leave a jar of fresh garlic covered in olive oil on the shelf for a month, planning it as a pantry gift.
Garlic in oil on a shelf can grow botulism. Fresh garlic in oil at room temperature allows spores to grow.
Fill the blank: Homemade garlic oil belongs in the ___ and gets used within a few days.
Homemade garlic oil belongs in the refrigerator and gets used within a few days. Cold storage slows bacteria, and quick use limits the risk.
True or false: If infused oil looks and smells normal, it is safe.
False. The toxin does not change the look or smell, so appearance proves nothing.
Which habit is the safest for flavored oil?
Make a small batch, chill it, use it fast. Small, cold and quick limits any chance for growth.