The published house bitters recipe lists a quarter teaspoon of calamus root, leaves a water-extracted botanical fraction at room temperature, and claims the bottled bitters will last indefinitely.
Displayed book p. 109; PDF screens 116–117
Bartlett Pear Bitters
Visual page inspection confirms the calamus quantity. 21 CFR 189.110 deems food with added calamus, its oil or extract adulterated; exclude as USWA preparation directions. Shelf-life claim is unvalidated. Reference: https://www.govinfo.gov/content/pkg/CFR-2025-title21-vol3/pdf/CFR-2025-title21-vol3-chapI.pdf
Source context
The published house bitters recipe lists a quarter teaspoon of calamus root, leaves a water-extracted botanical fraction at room temperature, and claims the bottled bitters will last indefinitely.
Assessment
Visual page inspection confirms the calamus quantity. 21 CFR 189.110 deems food with added calamus, its oil or extract adulterated; exclude as USWA preparation directions. Shelf-life claim is unvalidated.