01 - Preheat oven to 350°F. Line a 9×5-inch loaf pan with parchment paper or grease generously.
02 - In a large mixing bowl, whisk together the flour, sugar, baking powder, baking soda, and salt until evenly distributed.
03 - In a separate bowl, combine the melted butter, eggs, orange juice, orange zest, and vanilla extract. Whisk until smooth and fully blended.
04 - Pour the wet mixture into the dry ingredients. Stir gently with a spatula until just combined, being careful not to overmix.
05 - Gently fold the chopped cranberries and nuts (if using) into the batter until evenly distributed.
06 - Transfer the batter to the prepared loaf pan and smooth the top with a spatula for an even surface.
07 - Bake for 50–55 minutes, or until a toothpick inserted into the center of the loaf comes out clean.
08 - Remove from the oven and let cool in the pan for 10 minutes. Transfer to a wire rack and cool completely before slicing.