2Gradually add the vegetable oil, milk, and freshly squeezed orange juice. Mix well.
3Add the grated orange zest and vanilla extract, and mix until well combined.
4In a separate bowl, combine the flour and baking powder. Slowly add this mixture to the egg-sugar mixture, gently mixing until just combined.
5Pour the batter into a prepared loaf pan, spreading it evenly.
6Bake in a preheated oven at 160 degrees Celsius (320°F) for about 50 minutes, or until a toothpick inserted into the center comes out clean.
7Remove the cake from the oven and let it cool in the pan for a while. Carefully remove it from the pan and place it on a wire rack to cool completely.
8Before serving, dust the orange cake with powdered sugar for a touch of sweetness.