In a food processor, combine ground beef, salt, black pepper, ginger powder or minced ginger, soy sauce, dark soy sauce, sesame oil, and onion. Blend until well mixed. Transfer to a bowl and mix in the chopped scallions.

Roll out the dough and divide it into equal portions. Roll each portion into a thin wrap.

Fill each wrap with the beef mixture and shape it into a baozi.

Bring water to a boil in a steamer. Place the baozi inside, cover, and steam for 10-12 minutes. Turn off the heat and let them sit for 3 minutes before opening the lid. Enjoy!