Orange Marmalade Muffins

I was browsing through Food Gawker and these Orange Marmalade Muffins caught my eye. I LOVE the flavor of oranges, especially in the summer so I thought I'd give these a try. I didn't have any orange juice so I substituted buttermilk instead. It gave the muffins a wonderful creamy texture. I also doubled the amount of Orange Marmalade so I wouldn't lose any of the orange flavor. They came out really good, especially with the crunchy pistachios on top!