01 - Preheat oven to 350°F. Grease and flour a 9x5-inch loaf pan or line with parchment paper.
02 - In a large bowl, whisk together the flour, sugar, baking powder, baking soda, and salt until evenly distributed.
03 - In a separate bowl, lightly beat the eggs. Add milk, vegetable oil, orange zest, orange juice, and vanilla extract, and mix until well combined.
04 - Pour the wet mixture into the dry ingredients. Stir just until combined—do not overmix to keep the bread tender.
05 - Gently fold in the cranberries and nuts (if using) with a spatula, distributing them evenly throughout the batter.
06 - Transfer the batter into the prepared loaf pan and smooth the top with a spatula for an even finish.
07 - Bake for 50 minutes, or until a toothpick inserted into the center comes out clean with only a few moist crumbs.
08 - Let the bread cool in the pan for 15 minutes, then remove to a wire rack to cool completely before slicing.