Buttermilk (Best Option)
1 cup per 1 cup whole milkButtermilk works well because its acidity helps break down meat proteins, making the meatloaf more tender and moist. The fat content is close enough to whole milk to maintain richness and binding properties.
For best results, use full-fat buttermilk and mix it thoroughly with other ingredients to ensure even moisture distribution. Avoid using low-fat versions as they lack the necessary fat content.
Compared to whole milk, buttermilk adds a subtle tang that can enhance the savory flavor of meatloaf without compromising texture or moisture retention.