01 - Preheat oven to 350°F. Grease and flour a 9x5-inch loaf pan or line with parchment paper.
02 - Whisk together flour, sugar, baking powder, baking soda, and salt in a large bowl.
03 - In a separate bowl, whisk milk, oil or melted butter, eggs, vanilla extract, and orange zest.
04 - Pour wet ingredients into dry ingredients and gently stir until just combined; avoid overmixing.
05 - Fold in cranberries and nuts if using, ensuring even distribution.
06 - Pour batter into prepared loaf pan and smooth the surface.
07 - Bake for 50 to 60 minutes or until a toothpick inserted into the center comes out clean.
08 - Allow loaf to cool in pan for 10 minutes, then transfer to a wire rack to cool completely before slicing.