All-Purpose Flour (Best Option)
1 cup all-purpose flour per 1 cup cake flourAll-purpose flour has a moderate protein content (about 10-12%) which is higher than cake flour but still suitable for binding meatloaf ingredients. The gluten formed helps hold the meatloaf together without making it tough.
When using all-purpose flour, avoid overmixing the meat mixture to prevent toughness. You can also slightly reduce the flour amount by 1-2 tablespoons if you want a softer texture.
Compared to cake flour, the meatloaf will be a bit firmer but still tender and cohesive, making it a reliable and accessible substitute.