Initial Preparation: Preheat the oven to 350 degrees Fahrenheit (175 degrees Celsius). Grease a 9 x 5-inch loaf pan thoroughly to ensure that the bread does not stick.
Mixing Dry Ingredients: In a medium-sized bowl, combine the all-purpose flour, baking powder, and salt. Whisk these ingredients together until they are well blended and set aside.
Infusing Sugar with Orange Zest: In a smaller bowl, combine the granulated sugar with the orange zest. Mix these together with a spoon until the sugar is infused with the orange zest and has taken on a light orange hue. Set this aside as well.
Combining Wet Ingredients: In a larger bowl, whisk together the buttermilk, canola oil, orange juice, eggs, and vanilla extract. Ensure these ingredients are mixed thoroughly.
Incorporating Dry and Wet Mixtures: Gradually add the previously mixed dry ingredients and the orange zest-infused sugar to the wet mixture. Stir these together until just combined to avoid overmixing, which could affect the texture of the bread.
Adding Cranberries: Fold in the fresh cranberries gently with a wooden spoon or spatula until they are evenly distributed throughout the batter.
Baking: Pour the batter into the prepared loaf pan. Bake in the preheated oven for approximately 65-75 minutes. To prevent excessive browning, cover the bread loosely with aluminum foil if it begins to brown too quickly. The bread is ready when a toothpick inserted into the center comes out clean or with very few crumbs.
Cooling: After baking, remove the bread from the oven and let it cool in the pan for about 10-15 minutes. Then, transfer it to a wire rack to cool completely.