This section is from the book "Cooking Vegetables. Practical American Cookery", by Jules Arthur Harder. Also available from Amazon: The Physiology Of Taste.
Tonka (Feve). Tonkabohm.
No. 1598. - The Tonka Bean is the seed of a large tree that grows in Guiana, Mexico and the Southern part of America. The seed or bean is inclosed in an oblong, ovate pod, and is about one inch long and one-eighth of an inch wide. It has a dark brown, wrinkled, shining, thin and brittle skin, and a light brown oily kernel. It has a strong, agreeable aromatic odor and a bitterish taste. It is used for culinary purposes as a substitute for vanilla, which it resembles in flavor. Tobacconists use it largely to flavor tobacco and to mix with snuff when ground or powdered.
 
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