Baking Powder (Best Option)
3 teaspoons per 1 teaspoon of baking sodaBaking powder contains both an acid and a base, allowing it to produce carbon dioxide gas when moistened and heated, which helps the meatloaf rise and become tender. Unlike baking soda, it does not require an acidic ingredient to activate.
To ensure even leavening, mix baking powder thoroughly into the meat mixture. Be cautious not to overuse, as excessive amounts can impart a bitter taste.
Compared to baking soda, baking powder produces a gentler rise and slightly different crumb texture, but it effectively prevents a dense, heavy meatloaf.