In a skillet over medium heat, melt the butter and olive oil. Add the chopped onion and sauté until it becomes translucent, about 5 minutes.
In a large mixing bowl, combine the ground chicken, sautéed onions, breadcrumbs, milk, egg, chopped parsley, minced garlic, salt, and pepper. Mix until just combined.
Form the mixture into meatballs about 1 to 1.5 inches in diameter.
In the same skillet, add enough vegetable oil to cover the bottom and heat over medium-high heat.
Carefully place the meatballs in the skillet and fry for about 4-5 minutes on each side, until golden brown and cooked through.
In a separate pot, warm your favorite marinara sauce over medium heat.
Serve the meatballs with the warm marinara sauce over pasta or on their own. Enjoy!
