Preheat your oven to 375°F (190°C). Line a baking sheet with parchment paper
In a large mixing bowl, combine the ground beef, breadcrumbs, egg, grated Parmesan cheese, garlic powder, onion powder, salt, and pepper
Place the patties on the prepared baking sheet and bake in the preheated oven for 10-12 minutes, or until cooked through
While the patties are baking, prepare your toppings and mini burger buns or dinner rolls
Once the patties are cooked, remove them from the oven and assemble your Burger Mini Bites. Place a cooked patty on the bottom half of each mini bun or roll
Add a dollop of ketchup, mustard, and/or mayonnaise on top of the toppings, if desired
Allow the cookies to cool on the baking sheets for a few minutes before transferring them to wire racks to cool completely