Blueberry cream bread

This is adapted from a recipe that Williams Sonoma posted 12-15 years ago. It is fabulous. They do not have it on their website anymore. 1/2 cup butter room temperature 3/4 cup white sugar 1/4 cup brown sugar 2 eggs 1/2 cup sour cream 1 teaspoon salt 1/4 teaspoon cinnamon 1 teaspoon vanilla 1/4 teaspoon…