Question:
I have a recipe that calls for peppermint oil. Can the extract be substituted and where can you buy the oil? It is supposed to be a sensitive recipe, so I was not sure if they are the same or interchangeable. Thank you for your help. - J. Timmer (12/9/00)

Answer: 
Concentrated oils are stronger than extracts and it takes less oil than an extract when flavoring foods. I have heard that you would use 1/3 less of extract. I have not tried doing this and I can't find information on substituting, so I can't guarantee it. Let your nose and taste buds be the true judges of how much to use and experiment. Start with a little, as you can also add more.

Peppermint oil can be obtained at drug stores, cooking supply shops, and can be ordered on the internet.

Feedback: 
I was doing research today about what is Peppermint oil and ways to substitute it.  I came across your site along with one other.  This other site I found says 1/4 tsp of flavor-based oil may be substituted for 1 tsp of extract of the same flavor. 

I thought that this information would be helpful for your answer to Peppermint oil vs. peppermint extract. I hope that you find it helpful and I will find out this weekend if it is correct! - Michelle Guydosh (11/30/01)