Prepare the batter: In a large mixing bowl, add flour, sugar, baking powder, salt, and baking soda and whisk together. Add the butter and cut in - the texture should resemble cornmeal.
Bake the bread: In your 350-degree preheated oven, place the loaf pan in the middle of the center rack and bake for 60-70 minutes (70 minutes works for us!).