How does the flavor profile generated by the sun's fluctuating warmth differ from the steady, consistent chill experienced during refrigerator cold brewing?
The sun provides a slight, fluctuating boost in warmth that the consistent chill of the refrigerator lacks.
While both sun tea and refrigerator cold brew are characterized by low-temperature extraction which results in smooth, low-bitterness profiles, they differ fundamentally in the heat environment they utilize. Refrigerator cold brew maintains a stable, cold temperature, usually near 35°F to 40°F, throughout its very slow steeping process. Sun tea, however, benefits from ambient warmth, meaning its temperature is not static; it fluctuates as the sun intensity changes throughout the day, providing a slight, intermittent boost in warmth compared to the constant chill of the fridge. This subtle variation in temperature during the sun steep contributes to a flavor profile that is distinct from the purely consistent, chill-driven extraction achieved in the refrigerator.
