If the filling mixture seems too loose, continue cooking it until the moisture has evaporated out. Filling that is too wet will lead to soggy, leaky egg rolls.
Be sure to tightly wrap your egg rolls; any exposed filling will leak out when frying.
Use a neutral oil with a high smoke point to fry these egg rolls, such as vegetable, canola, or peanut oil.
Watch the temperature with a deep frying thermometer to ensure it stays consistent.
Don’t overcrowd the Dutch oven, as too many egg rolls will lower the temperature of the oil, leading to oily egg rolls. I recommend cooking the egg rolls in batches of 3-4. Between each batch, check the temp of the oil again. Make sure it is always at 375°F before adding another batch.
Once the egg rolls are golden brown and crisp, transfer them to a paper towel-lined plate to drain and cool. This will help keep them crispy.