 Now, European butter, if you choose it and use it, you will notice the difference in your pie crust right away. Guaranteed. And it's delicious. Now, there is such a thing as cultured butter, also known as Danish-style butter. It actually has a culture added to the cream before it is churned. It is kept at a controlled temperature, usually overnight, so that this slightly acidic flavor develops. And then according to European tradition, no salt is added after draining the butter.