Preheat the oven to 350 degrees Fahrenheit. Grease a loaf pan and set aside. I used an 8.5 x 4.5-inch loaf pan.
In a medium bowl, add 1 ½ cups all-purpose flour, 1 teaspoon baking powder, and ¾ teaspoon salt, and whisk to combine.
In a large bowl, add 1 ¼ cups sugar and 2 tablespoons orange zest. Use your fingers to rub the orange zest into the sugar. This will release the oils in the orange zest.
Whisk in 2 large eggs, ½ cup canola oil, ½ cup orange juice, ¼ cup buttermilk, and 2 teaspoons vanilla extract.
Add the dry ingredients to the wet ingredients, mixing until just combined.
Pour the batter into the prepared pan and bake for 45-50 minutes, until a toothpick inserted into the center comes out clean.
Once baked, let the loaf cool in the pan for 15 minutes, then transfer to a wire rack to finish cooling.
Orange Glaze
To make the glaze, whisk together 1 cup powdered sugar, 2 teaspoons orange zest, and 2-3 tablespoons orange juice in a medium bowl until smooth and combined.
Pour the glaze evenly over the cooled loaf. Let the glaze set before cutting into slices and serving.
Notes
Storage and Make-Ahead Instructions
Storing: Store leftovers in an airtight container at room temperature for up to 4 days.
Freezer: Cool completely, then wrap tightly in plastic wrap and place in a freezer bag. Freeze whole or sliced for up to 3 months.
Make Ahead: Assemble the batter in the loaf pan, cover, and refrigerate until ready to bake, up to 24 hours. Add about 5 minutes to the bake time.