01 - Preheat oven to 350°F. Grease and flour a 9-inch round cake pan or line it with parchment paper.
02 - In a medium bowl, whisk together flour, baking powder, baking soda, and salt.
03 - In a large bowl, whisk sugar, vegetable oil, and eggs until light and creamy.
04 - Stir fresh orange juice, orange zest, milk, and vanilla extract into the wet mixture until well combined.
05 - Gradually fold dry ingredients into wet mixture until just combined, avoiding overmixing.
06 - Pour batter into prepared pan and smooth the surface evenly.
07 - Bake for 35 to 40 minutes or until a toothpick inserted in the center comes out clean.
08 - Let cake cool in pan for 10 minutes, then invert onto a wire rack to cool completely.
09 - Mix powdered sugar with fresh orange juice until smooth and pourable; drizzle over cooled cake prior to serving.