Prepare the Beef

• In a mixing bowl, combine the minced beef, cornstarch, sugar, soy sauce, and white pepper powder. Mix thoroughly with a spatula until evenly combined.
• Cover and refrigerate the beef mixture for 30 minutes to allow the flavors to develop.
• Heat a small amount of oil in a frying pan over medium heat. Add the beef mixture and cook for several minutes, breaking it into small pieces as it browns, until fully cooked.
• Transfer the cooked beef to a plate and set aside.

Prepare the Vegetable Filling

• In the same pan, add a little more oil if needed. Sauté the grated garlic and ginger over medium heat until fragrant and lightly golden.
• Add the shiitake mushrooms, cabbage, carrot, and spring onion. Cook until the vegetables are just tender, but not soft or mushy.
• Return the cooked beef to the pan and add the oyster sauce. Stir until evenly combined.
• Remove the filling from the heat and allow it to cool completely before assembling the spring rolls. If the filling appears overly moist or saucy, place it in a colander to drain excess liquid.

Prepare the Slurry Glue

• In a small bowl, combine the flour and water. Stir until a thick, smooth paste forms.

Assemble the Spring Rolls

• Place one spring roll wrapper on a clean work surface and keep the remaining wrappers covered with a damp cloth to prevent them from drying out.
• Fold the bottom third of the wrapper inward and place a portion of the filling on top.
• Fold the left and right sides inward toward the center.
• Roll the wrapper tightly, leaving the top corner exposed. Brush the top corner with the slurry glue, then continue rolling to seal the spring roll completely.
• Repeat with the remaining wrappers and filling.

Cooking Methods

Deep-Frying

• Heat a pot with enough oil for frying over medium heat.
• Once the oil is hot, carefully add the spring rolls in batches. Fry for 5 to 8 minutes, turning occasionally, until golden brown and crisp.
• Transfer the spring rolls to a plate lined with paper towels to absorb excess oil.

Air-Frying

• Preheat the air fryer to 400°F (200°C).
• Arrange the spring rolls in the air fryer basket in a single layer and lightly spray them with oil.
• Air-fry for about 30 minutes, flipping halfway through, until golden brown and crisp.

Oven-Baking

• Preheat the oven to 430°F (220°C).
• Arrange the spring rolls on a parchment-lined baking tray and lightly spray them with oil.
• Bake for about 30 minutes, flipping halfway through, until golden brown and crisp.

Serve

• Serve the spring rolls hot with sweet chili sauce or your preferred dipping sauce.