Preheat oven to 350°F. Grease a 9-inch round cake pan and line the bottom with parchment paper.
In a large bowl, whisk together the olive oil, sugar, eggs, Greek yogurt, vanilla, lemon juice, and lemon zest until smooth.
In a medium bowl, whisk together the all-purpose flour, whole wheat flour, baking powder, baking soda, and salt.
Add the dry ingredients to the wet ingredients and gently fold until just combined.
Pour the batter into the prepared pan and smooth the top.
Bake for 45–55 minutes, or until a toothpick inserted into the center comes out clean. For cupakes, bake 18-22 minutes
Cool in the pan for 15 minutes before transferring to a wire rack.
Dust with powdered sugar before serving, if desired.
