We describe, discuss and illustrate a metaphoric parallel between the history of the most famous Spanish liqueur, "Anis del Mono" ("Anis" of the Monkey), and the evolution of living organisms in the light of Darwinian theory and other biological hypotheses published subsequent to Charles Darwin's "Origin of Species." Also, we report the use of a caricature of a simian Darwin with a positive connotation, perhaps the only one ever produced. We conclude that, like some species in the natural world, "Anis" of the Monkey has evolved, adapted, survived and become the fittest and most successful "anis" in the Spanish market and possibly the world. We hope this paper will contribute a new useful metaphor for the teaching of biological evolution.