01 - Preheat oven to 350°F. Grease a 9-inch round cake pan and line base with parchment paper.
02 - Whisk together flour, baking powder, baking soda, and salt in a medium bowl.
03 - Whisk sugar and eggs in a large bowl until pale and lightly thickened, about 2 minutes.
04 - Gradually whisk in olive oil until smooth and fully blended.
05 - Whisk in milk, orange juice, lemon juice, orange zest, lemon zest, and vanilla extract until combined.
06 - Gently fold dry ingredients into wet mixture using a spatula until just incorporated; avoid overmixing.
07 - Pour batter into prepared pan and smooth the surface evenly.
08 - Bake for 35 to 40 minutes or until a toothpick inserted into center comes out clean and top is golden.
09 - Allow cake to cool in pan for 15 minutes, then unmold onto a wire rack to cool completely.
10 - Dust with powdered sugar and accompany with whipped cream or Greek yogurt; garnish with extra citrus zest if desired.