From The Long Lost Friend:
Take pumpkins, boil them, press the juice out of them, and boil the juice to a proper consistence. There is nothing else necessary. The author of this book, John George Hohman has tasted this molasses, thinking it was the genuine kind, until the people of the house told him what it was.
The grimoire The Long Lost Friend lists this spell.
Timeline of related events
1820Publication of Hohmann's Long Lost Friend (lists this spell)