Buttermilk Substitution
If you don’t have Buttermilk on hand, you can use this trick as a substitute: Add one tablespoon of lemon juice to a measuring cup. Add milk and fill to the 1 cup measurement line. Stir the mixture together and let sit for 5 minutes. Since this recipe calls for 1/2 cup you will need to adjust accordingly.
Another option is to use a cultured buttermilk blend. All you need to do is add water. I was very skeptical at first but in a pinch it works great!
Tips
For even more flavor, try doubling the amount of cinnamon and molasses in the batter for the center and top of the loaf.