Traditional German Sauerbraten

Name: Traditional German Sauerbraten
Prep time: 20 min
Cook time: 2 h 5 min
Total time: 2 h 25 min
Cuisine: German
Ingredients: 3.5 pounds beef round steak; 1 tablespoon salt; ground black pepper to taste; 16 fluid ounces vinegar; 1.5 cups sliced carrots; 1 cup sliced onion; 12 peppercorns; 5 whole cloves; 3 bay leaves; 1 sprig fresh parsley, chopped; 2 tablespoons all-purpose flour; 0.25 cup butter; 8 gingersnap cookies, crushed, or more to taste; 1 tablespoon white sugar