⭐ Coconut Milk + Lemon Juice (Best Vegan Option)
1 cup coconut milk + 1 tablespoon lemon juice (let sit 5 minutes)Coconut milk offers a rich, creamy base, and when combined with lemon juice, it gains the acidity needed to mimic buttermilk’s tang. The acid slightly thickens the coconut milk and balances its natural sweetness.
Let the mixture sit for 5 minutes before adding to the soup, and add it near the end of cooking to avoid separation. Be mindful that the coconut flavor may subtly influence the soup’s overall taste.
This substitute works well in soups where a hint of coconut is complementary, providing creaminess and acidity but with a different flavor profile than traditional buttermilk.