Question: things to do with buttermilk?
Answer: Bake with it. Buttermilk makes tender cakes, quick breads and biscuits, and works with both sweet and savory flavors. ... 
Make a batch of pancakes. Tender and a little tangy, buttermilk pancakes are a classic for a reason. ... 
Make a creamy salad dressing. ... 
Use it in frozen treats. ... 
Make fried chicken and coleslaw for dinner.