Preheat oven to 350℉ (177℃). Line a 9-inch cake pan with a circle of parchment paper in the bottom. Spray the bottom and sides with baking spray.
Combine sugar, eggs, lemon zest. Beat for 2 to 3 minutes until thick, creamy, and light.
1 cup (200g) granulated sugar, 2 large eggs, 1 Tablespoon lemon zest
Add olive oil, sour cream, milk, lemon juice, and vanilla. Scrape the bottom and sides of the bowl.
2/3 cup (140g) extra virgin olive oil, 1/2 cup sour cream, 1/4 cup milk, 1/4 cup fresh lemon juice, 2 teaspoons pure vanilla extract
Add flour, baking powder, and salt. Pour into prepared pan and tap against the counter a few times.
1 1/2 cups (212g) all-purpose flour, 1 teaspoon baking powder, 1/2 teaspoon salt
Bake for 25 to 30 minutes. Cool for 5-7 minutes in pan before turning out to cool completely on a wire rack.
Dust with powdered sugar before serving.
Powdered sugar