Moist, with a light orange flavor, I like to eat a loaf now and freeze a loaf for later. You might consider throwing in some dried cranberries. Don't skip the glaze on this one. From The Upham Hotel & Garden Cottages in Santa Barbara
Preheat oven to 350°F In a large bowl, cream butter and cream cheese with a mixer on medium speed. Chop orange to fine pieces in a food processor. Add chopped orange and sugar to butter mixture; beat for about 2 minutes, until fluffy. Add eggs, 1 at a time, beating well after each addition. Beat in vanilla.
In a medium bowl, combine flour, baking soda and salt; add to butter mixture and beat until smooth.
Add sour cream and beat until well combined.
Pour batter into a greased Bundt pan or 2 (9x5-inch) loaf pans. Bake 50-60 minutes, until a toothpick inserted in center comes out clean. Cool cake in pan for 5 minutes, then remove from pan and cool completely.
Drizzle with orange icing, slice and serve.
For the icing: Mix powdered sugar an denough orange juice to form a drizzling consistency. Mix until smooth.