Beef Broth (Best Option)
1:1 (1 cup beef broth per 1 cup chicken broth)Beef broth contains similar amino acids and glutamates that provide umami, which is essential for the savory profile of meatloaf. It also has a comparable salt and fat content, helping to keep the meatloaf moist and flavorful.
When using beef broth, ensure it is low sodium to avoid over-salting. Adjust seasoning accordingly and consider the slightly stronger flavor that beef broth imparts.
The final meatloaf will have a deeper, richer flavor but remain balanced and moist, closely mimicking the original intent of chicken broth in the recipe.