01 - Preheat the oven to 350°F (175°C). Grease and flour a 9×5-inch loaf pan, or line it with parchment paper.
02 - In a large mixing bowl, whisk together the all-purpose flour, granulated sugar, baking powder, baking soda, and salt until evenly distributed.
03 - In a separate bowl, lightly beat the eggs. Add the milk, vegetable oil, orange zest, freshly squeezed orange juice, and vanilla extract, then whisk until smooth and well combined.
04 - Pour the wet mixture into the dry ingredients. Stir gently just until combined—do not overmix, as this can make the bread tough.
05 - Gently fold in the cranberries and chopped nuts (if using) with a spatula, distributing them evenly throughout the batter.
06 - Pour the batter into the prepared loaf pan and smooth the top with a spatula for an even surface.
07 - Bake for 45–55 minutes, or until a toothpick inserted into the center comes out clean. A few moist crumbs are acceptable. Check at the 45-minute mark to avoid overbaking.
08 - Allow the bread to cool in the pan for 15 minutes, then transfer to a wire rack to cool completely before slicing into 8–10 servings.