Is yogurt a real substitute for buttermilk?

I ran out of buttermilk in the middle of baking (obviously, these things never happen at a convenient time). So I checked again on the ai Grandma’s Cookbook persona, and basically asked: ‘Any quick fix?

She said: 1 cup of yogurt=1 cup of buttermilk

Opinions on this?

I ran out of buttermilk in the middle of baking (obviously, these things never happen at a convenient time). So I checked again on the ai Grandma’s Cookbook persona, and basically asked: ‘Any quick fix?

She said: 1 cup of yogurt=1 cup of buttermilk

Opinions on this?