Pour the milk over the breadcrumbs in a small bowl and let them sit for 2 minutes. This creates a paste that binds everything together without making the meatballs dense. Skip this step and you'll end up with crumbly meatballs that fall apart.
Combine the ground beef, soaked breadcrumbs, egg, Parmesan, soy sauce, garlic powder, onion powder, smoked paprika, oregano, and black pepper in a large mixing bowl. Mix gently with your hands for about 1 minute—don't overmix or the meatballs get tough. I used to blend everything aggressively and wondered why mine weren't fluffy.
Roll the mixture into 24 meatballs roughly the size of walnuts. Aim for consistent sizing so they cook evenly. I use a 1-tablespoon cookie scoop to keep them uniform, which honestly saves so much time.
Heat the olive oil in a large skillet over medium-high heat until it shimmers. Working in batches, place meatballs in the pan and sear for 3-4 minutes per side until they're golden brown on the outside. Don't crowd the pan—they need space to develop that golden edge.
Once all meatballs are seared and cooked through (internal temp hits 160°F), transfer them to a serving platter. Sprinkle the fresh parsley over the top immediately while they're still warm. The heat brings out that fresh herb flavor.