โญ Carbonated Water (Best Nut-Free Option)
1/4 cup carbonated water per 1 eggThe bubbles in carbonated water provide leavening by creating air pockets in the dough, mimicking the aeration eggs provide.
Add just before baking to retain carbonation. This works best when combined with a small amount of fat to help structure.
Biscuits may be lighter but slightly less rich and tender compared to egg-containing versions.