โญ Whole Soy Milk (Best Dairy-Free Option)
1:1 substitution (1 cup whole soy milk per 1 cup whole milk)Whole soy milk contains comparable protein and fat levels to whole milk, which supports the emulsification process in Hollandaise sauce. The proteins help stabilize the mixture, while the fat adds creaminess.
To use soy milk successfully, ensure it is unsweetened and unflavored. Heat gently and whisk continuously to avoid separation. Soy milk can sometimes cause a slight beany aftertaste.
The sauce will be slightly less rich and may have a subtle flavor difference, but the texture and stability remain acceptable.