01 - Preheat oven to 350°F. Grease and flour a 9x5-inch loaf pan or line it with parchment paper.
02 - In a large bowl, whisk together flour, sugar, baking powder, baking soda, and salt.
03 - In a separate bowl, whisk melted butter, egg, orange juice, vanilla extract, and orange zest until blended.
04 - Pour the wet mixture into the dry ingredients and stir until just combined, careful not to overmix.
05 - Gently fold in cranberries and nuts if using, ensuring even distribution.
06 - Pour the batter into the prepared loaf pan and smooth the surface evenly.
07 - Bake for 50 to 60 minutes, or until a toothpick inserted into the center comes out clean.
08 - Allow the bread to cool in the pan for 10 minutes before transferring to a wire rack to cool completely prior to slicing.