Preheat your oven to 400°F (200°C).
In a large bowl, combine ground chicken, breadcrumbs, and Parmesan cheese.
Add chopped parsley, egg, minced garlic, onion powder, salt, black pepper, and red pepper flakes.
Mix all ingredients thoroughly until well combined.
Form the mixture into meatballs, about 1.5 inches in diameter.
Place the meatballs on a baking sheet lined with parchment paper.
Bake in the preheated oven for 20-25 minutes until golden brown.
Meanwhile, warm the marinara sauce in a small saucepan.
Once meatballs are cooked, remove them from the oven and let them rest for a few minutes.
Serve the meatballs with marinara sauce for dipping.