Milk + Lemon Juice or Vinegar (Best Option)
1 cup milk + 1 tablespoon lemon juice or white vinegarButtermilk’s acidity is crucial for reacting with baking soda to produce carbon dioxide, which helps the dough rise and become tender. Adding lemon juice or vinegar to milk acidifies it, effectively replicating this reaction. The liquid consistency remains similar to buttermilk, ensuring proper dough hydration and texture.
For best results, mix the lemon juice or vinegar into the milk and let it sit for 5-10 minutes before using. This allows the milk to curdle slightly, enhancing acidity. Avoid using skim milk as the fat content also contributes to tenderness.
Compared to real buttermilk, this substitute produces nearly identical texture and rise, maintaining the soft, fluffy crumb and subtle tang that cinnamon rolls require.