Cheeseburger Mini Muffins

1/2 pound ground beef
1 small onion, finely chopped
2-1/2 cups all-purpose flour
1 tablespoon sugar
2 teaspoons baking powder
1 teaspoon salt
3/4 cup ketchup
3/4 cup milk
1/2 cup butter, melted
2 eggs
1 teaspoon prepared mustard
2 cups (8 ounces) shredded cheddar cheese

In a large skillet, cook beef and onion over medium heat until meat is no longer pink; drain.

In a small bowl, combine the flour, sugar, baking powder and salt. In another bowl, combine the ketchup, milk, butter, eggs and mustard; stir into the dry ingredients just until moistened. Fold in the beef mixture and cheese.

Fill greased miniature muffin cups three-fourths full. Bake at 425° for 15-18 minutes or until a toothpick comes out clean. Cool for 5 minutes before removing from pans to wire racks. Serve warm. Refrigerate leftovers. Yield: 5 dozen. Yields about 30 muffins.