01 - Preheat the oven to 350°F. Grease a 9-inch round cake pan and line the bottom with parchment paper.
02 - In a large bowl, whisk together olive oil, eggs, orange juice, lemon juice, orange zest, lemon zest, and vanilla extract until the mixture is smooth and homogenous.
03 - In a separate bowl, sift together the flour, sugar, baking powder, baking soda, and salt for even distribution.
04 - Gradually fold the dry ingredients into the wet mixture using a spatula, stirring gently until just combined to avoid overmixing.
05 - Pour the batter into the prepared cake pan and smooth the surface with a spatula. Bake for 38 to 42 minutes, or until a toothpick inserted in the center comes out clean.
06 - Allow the cake to cool in the pan for 10 minutes before transferring it to a wire rack to cool completely.
07 - Dust the cooled cake with powdered sugar and garnish with extra citrus zest, if desired, before serving.