16/06/2026
1. The Oil Temperature is Too High
This is the number one cause of undercooked interiors. If your oil is too hot (above 170°C–180°C), the outside of the dough cooks and turns a deep golden brown within minutes. This forces you to pull them out of the oil early to prevent burning, but the heat never had enough time to travel through the thick dough to fry the inner layers.
2. Rolling the Dough Too Thick
When portioning out your dough, if the wrapper is too thick around the egg, it creates a massive thermal barrier. The outside layer will fry beautifully, but the inner core remains insulated and raw. For a commercial, standard-sized egg roll, aiming for a dough ball portion of roughly 80 grams per egg gives you the perfect crust-to-egg ratio that can cook through completely.
3. Frying Straight from the Fridge (Cold Eggs)
If your boiled eggs are cold from the refrigerator when you wrap them in the dough, they act like ice packs inside the pastry. When dropped into the hot oil, the cold egg actively fights the heat trying to move inward, keeping the innermost layer of dough cold, wet, and raw while the outside fries. Always ensure your boiled eggs are completely at room temperature before wrapping.
4. Overcrowding the Frying Pan
Dropping too many egg rolls into your pan at the same time causes the temperature of your oil to crash drastically. Instead of frying smoothly, the egg rolls sit in lukewarm oil, soaking up fat without actually cooking the starch inside. Once the oil slowly climbs back up in temperature, it quickly browns the saturated outer crust while leaving the center heavy and undone.
