Yes, simple syrup can ferment.
Simple syrup, a mixture of sugar and water, provides the necessary ingredients for fermentation if exposed to yeast or bacteria. This is because the sugar serves as food for these microorganisms.
Factors Influencing Fermentation
Several factors influence how quickly simple syrup ferments:
- Sugar Ratio: Syrups with a higher sugar concentration (e.g., 2:1 sugar to water) are less prone to fermentation because the high sugar content inhibits microbial growth.
- Storage Conditions: Warm temperatures accelerate fermentation, while refrigeration slows it down.
- Contamination: Exposure to air, unsterilized utensils, or unclean containers introduces yeast and bacteria.
How to Prevent Fermentation
To prevent your simple syrup from fermenting:
- Refrigerate: Store simple syrup in the refrigerator.
- Sterilize: Use sterilized containers and utensils.
- High Sugar Concentration: Prepare a simple syrup with a higher sugar concentration (2:1 ratio).
- Use Quickly: Use the simple syrup within a few days if it's a 1:1 ratio, and within a week if it's a 2:1 ratio.
Consequences of Fermented Simple Syrup
Fermented simple syrup will taste sour or alcoholic. While it might not be harmful in small quantities, it won't have the desired flavor for its intended use in beverages or desserts.
