Substitute sour cream for buttermilk
I'm making a Chocolate Zucchini cake and the recipe asks for buttermilk, I know I can turn milk + lemon juice into a buttermilk substitute, but I'd really like to use up the half tub of sour cream left in the fridge, any ideas? And since we're here, what about substituting sour cream for yogurt in baking? is that possible? Thanks!