Fair question... First, know that we do not make money on the shipping charges. The cost added to your order goes right to the shipper (FedEx, UPS, USPS, etc.).
And, to the heart of your question: butter is a perishable food, meaning it must stay at-or-below refrigerator temperatures to ensure it stays fresh and maintains its high quality. Given that, we must ship our product using overnight shipping services (especially during summer months).
As I'm sure you know, overnight shipping is not cheap, especially with gas prices at their current levels. But, rest assured that when shipping prices come down, our costs will come down as well.