Overview

Tepache is a traditional Mexican fermented beverage made primarily from pineapple peels. It is lightly alcoholic, mildly acidic, and commonly consumed as a refreshing drink, particularly in central and southern Mexico.

Raw Materials

  • Pineapple peels and pulp (Ananas comosus)
  • Water
  • Unrefined sugar (e.g. piloncillo or brown sugar)
  • Spices (often cinnamon; optional)

Fermentation Process

Pineapple peels are submerged in water with added sugar and spices. The mixture is allowed to ferment spontaneously at ambient temperature for 1–3 days. Yeasts initiate alcoholic fermentation, while lactic acid bacteria contribute to acidification. The beverage is typically consumed fresh after brief fermentation.

Microbial Ecology

Tepache fermentation involves a mixed microbial consortium, including:

  • Yeasts (Saccharomyces spp. and non-Saccharomyces yeasts)
  • Lactic acid bacteria (Lactobacillus spp.)

This mixed ecology produces ethanol, organic acids, and aromatic compounds.

Functional and Nutritional Aspects

  • Low alcohol content (typically <3%)
  • Utilisation of fruit by-products (pineapple peels)
  • Organic acids contribute to flavour and short-term preservation

Cultural Significance

Tepache has pre-Hispanic origins and remains widely produced at household and street-vendor levels. It represents an accessible, low-technology fermentation embedded in everyday Mexican food culture.

References

  1. Escalante, A., Giles-Gómez, M., Hernández, G., Córdova-Aguilar, M. S., López-Munguía, A., Gosset, G., & Bolívar, F. (2008). Analysis of bacterial community during the fermentation of pulque. Applied and Environmental Microbiology, 74(10), 3254–3268.
  2. Steinkraus, K. H. (1996). Handbook of Indigenous Fermented Foods. Marcel Dekker, New York.
  3. Tamang, J. P., Watanabe, K., & Holzapfel, W. H. (2016). Diversity of microorganisms in global fermented foods. Frontiers in Microbiology, 7, 377.