Milk-based sweets should generally not be stored unrefrigerated overnight due to the risk of bacterial growth and spoilage. Refrigeration is crucial to maintain their safety and quality.
Milk-based sweets, such as rasgulla, gulab jamun, barfi, and peda, are highly susceptible to spoilage at room temperature. Milk and milk products provide a rich medium for bacterial growth. Bacteria thrive in warm environments, and leaving these sweets out overnight (especially in a warm climate) creates ideal conditions for rapid bacterial multiplication. This can lead to the production of toxins that cause food poisoning. Symptoms of food poisoning can include nausea, vomiting, diarrhea, and abdominal cramps. Refrigeration slows down the growth of bacteria significantly, extending the shelf life and ensuring the safety of these sweets. Ideally, milk-based sweets should be stored in an airtight container in the refrigerator at a temperature below 4°C (40°F). This will help to preserve their flavor, texture, and safety for a longer period.
If you must leave milk-based sweets out for a short period (e.g., during a party), keep them in a cool, shaded area and consume them within a few hours. Discard any leftovers that have been at room temperature for more than 2-4 hours to minimize the risk of foodborne illness.