Preparing the Filling
Start by heating 2 tablespoons of vegetable oil in a large skillet or wok over medium-high heat. Once the oil shimmers, add the ground pork, breaking it apart with a wooden spoon. Cook until the meat is browned and no longer pink, approximately 5 to 7 minutes. Remove the cooked pork and set it aside, leaving about 1 tablespoon of fat in the pan.
In the same pan, add the minced ginger and garlic, stirring constantly for about 30 seconds until fragrant. Be careful not to burn them. Add the shredded cabbage and carrots, stir-frying for 3 to 4 minutes until they begin to soften but still retain some crunch.
Return the cooked pork to the pan along with the bean sprouts. Pour in the soy sauce, oyster sauce, and sesame oil, tossing everything together to combine evenly. Sprinkle with white pepper and add the green onions, stirring for another minute. The filling should be moist but not watery.
Transfer the filling to a large plate or baking sheet and spread it out to cool completely. This step is crucial because hot filling will make the wrappers soggy and difficult to work with. You can refrigerate the filling to speed up this process.
Wrapping Technique
Proper wrapping technique ensures your egg rolls stay sealed during frying. Place an egg roll wrapper on a clean, dry surface with one corner pointing toward you, creating a diamond shape. Spoon about 2 to 3 tablespoons of filling onto the wrapper, forming a horizontal line about 2 inches from the bottom corner.
Fold the bottom corner up over the filling, tucking it tightly underneath. This initial fold should be snug to prevent air pockets. Fold in the left and right corners toward the center, creating an envelope shape. Continue rolling away from you, keeping the roll tight and compact.
When you reach the top corner, dip your finger in water and moisten the edge of the wrapper. Press firmly to seal. The egg roll should be uniform in thickness and tightly sealed at all points. Place the finished egg roll seam-side down on a baking sheet and cover with a damp towel to prevent drying while you prepare the remaining rolls.
Cooking Methods
Deep Frying (Traditional Method)
Deep frying produces the crispiest, most authentic texture. Heat your oil in a deep pot or fryer to 350°F (175°C). Use a thermometer to maintain accurate temperature, as oil that’s too cool will result in greasy egg rolls, while oil that’s too hot will burn the outside before cooking the inside.
Carefully lower 3 to 4 egg rolls into the hot oil, being careful not to overcrowd the pot. Fry for 3 to 4 minutes, turning occasionally with tongs or a slotted spoon, until golden brown on all sides. The egg rolls should be deep golden and crispy.
Remove the egg rolls and drain them on a wire rack set over a baking sheet or on paper towels. Allow the oil to return to temperature before frying the next batch. This ensures consistent results across all your egg rolls.
Baking Method (Healthier Alternative)
For a lighter version, baking is an excellent option. Preheat your oven to 425°F (220°C) and line a baking sheet with parchment paper. Arrange the egg rolls seam-side down, ensuring they don’t touch.