Why Soy Milk Is A Perfect Non-Dairy Alternative For Unfrosted Desserts - Tasting Table
Briefly

Soy milk is the ideal milk substitute for dairy-free baking due to its higher protein content, enabling proper consistency and aesthetic browning of baked goods.
Using a 1:1 ratio for replacing dairy milk with soy milk simplifies the process, and flavored variations can enhance the taste of cakes and desserts.
Read at Tasting Table
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