Preheat the oven to 400°F (200°C).
In a large mixing bowl, combine ground beef, breadcrumbs, onion, parsley, egg, garlic powder, salt, and pepper.
Form the mixture into 1-inch meatballs and place them on a lined baking sheet.
Bake the meatballs for 20-25 minutes or until they are browned and cooked through.
While the meatballs are baking, prepare the whiskey peach BBQ sauce by combining peach preserves, whiskey, and ketchup in a saucepan.
Simmer the sauce for about 10 minutes, until slightly thickened.
Once the meatballs are done, remove them from the oven and let them cool for a few minutes.
Toss the meatballs in the whiskey peach BBQ sauce until well coated.