I use Unsalted Butter or Soft Baking Butter. Unsalted Butter is just Cream. Soft Baking Butter is a mix of Cream, Canola Oil, and Salt. No hydrogenated Oils...Though, you do have to be carefull, because the same company puts out a Garlic Butter with Olive Oil which if I remember correctly contains Hydrogenated Oils.

The plus for Soft Baking Butter is in the first word of the name...It is very soft. Because it contains liquid oils, it is softer, spreads easier, and melts easier than pure butter.