I prefer not to think about all the expired buttermilk I've poured down the drain.
Instead, let's talk about what I found in the baking section of my grocery store this weekend.
It's powdered buttermilk. And it worked perfectly in this Strawberry Buttermilk Cake.
I highly recommend both — the powdered buttermilk and the recipe.
Just remember to read the directions on the box. Instead of reconstituting the buttermilk, you're supposed to mix the powdered buttermilk in with your dry ingredients and the water with the wet ingredients.