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Wintergreen Wafers
1 oz. gum tragacanth 1 cup cold water Confectioners' sugar Oil of wintergreen Soak gum tragacanth in water twenty-four hours and rub through a fine wire sieve; add enough confectioners' sugar to knead. Flavor with a few drops of oil of wintergreen. If liked pink, color with fruit red. Roll until very thin on a board or marble dredged with sugar.
Shape with a small round cutter or cut in three-fourths inch squares. Spread wafers, cover, and let stand until dry and brittle. This mixture may be flavored with oil of lemon, clove, sassafras, etc., and colored as desired.
This is a gum paste pastille of the old apothecary type, and the flavorings it calls for are the problem. Both named oils are sold today in concentrations that do not belong in a home confection measured in drops.
- Oil of wintergreen is methyl salicylateThe undiluted oil sold under that name is roughly 98 percent methyl salicylate, a salicylate far more concentrated by volume than aspirin. A single teaspoon is a documented lethal dose for a small child, and "a few drops" from an unknown dropper into a batch of candy that children will eat by the handful is not a measurement anyone can stand behind.
- Not the same product the book meantWhat ships today under that label is frequently a pure essential oil intended for topical or industrial use, sometimes distilled from birch rather than Gaultheria, and not sold as food. What strength of flavoring oil a period grocer or druggist actually supplied for this recipe is not something we can establish, so substituting one product for the other by drop count is guesswork with a toxic margin.
- Oil of sassafras is bannedThe recipe offers sassafras as an alternative flavor. Sassafras oil is high in safrole, which the FDA prohibited in food in 1960 after it was shown to cause liver tumors in animals. Safrole-free sassafras extract exists, but the whole oil called for here does not lawfully belong in food.
- Oil of clove and oil of lemonThese two are ordinarily food-safe flavorings, but they are also sold as concentrated essential oils where a few drops of the modern product is far stronger than the 1896 grocery article. The same dosing ambiguity applies.
- Gum tragacanth itself is fineThe gum is a natural exudate of Astragalus shrubs, still approved as a food additive and still sold to cake decorators. An ounce to a cup of water gives a very stiff mucilage, and the twenty-four hour soak plus the sieving are there because the gum hydrates slowly and unevenly. None of that is the hazard.
- If you want the sweetsUse a current pastille or gum-paste recipe from a source that specifies a food-grade, pre-diluted flavoring extract and a quantity in teaspoons rather than drops.
Wafers like these sit exactly on the line between the candy shop and the drugstore. Gum tragacanth paste, sugar, and a volatile oil is the formula for the pharmacist's lozenge or troche, pressed or cut and left to air-dry hard; wintergreen, clove, sassafras and lemon were the standard lozenge flavors precisely because they were the standard carminative and breath-sweetening oils on the apothecary's shelf. Fannie Farmer's Confections chapter was written for households that expected to turn out fondants, creams, and gum drops at home rather than buy them, and this is the driest and most technical of them, requiring nothing but patience and a marble slab. Wintergreen was an American favorite drawn from Gaultheria procumbens, the creeping evergreen of northeastern woods, long gathered and chewed before anyone bottled its oil; by the time this book appeared synthetic methyl salicylate was available alongside the natural oils, and it is that industrial concentration, cheap and potent, that makes the recipe's casual "few drops" unrepeatable now.