Gluten Free Cranberry Bread

Name: Gluten-Free Cranberry Bread
Ingredients: 8 tablespoons unsalted butter, at room temperature; 1 cup granulated sugar, plus 1 tablespoon; 3 eggs at room temperature; 2 1/2 cups all-purpose gluten-free flour (I used Better Batter); 1 teaspoon baking powder; 1/2 teaspoon baking soda; 3/4 teaspoon kosher salt; 10 ounces fresh cranberries, halved; 2/3 cup milk, at room temperature; 1/4 cup sour cream or plain Greek yogurt, at room temperature