3 3/4 C. (about 18 3/4 oz.) all purpose flour
1 tsp. baking powder
1 tsp. cinnamon
1 tsp. kosher salt
1 C. (about 7 oz.) sugar
3/4 C. olive oil
3/4 C. freshly squeezed orange juice from about 3 large oranges
1 tsp. vanilla extract
Confectioners’ sugar

Adjust oven rack to middle position and preheat oven to 350°F. Grease springform pan with olive oil and dust with flour, knocking out any excess. In a large bowl, whisk together flour, baking powder, cinnamon, salt, and sugar. Add olive oil, orange juice, and vanilla and stir to combine. Batter will be very thick. Scrape batter into prepared pan and bake until golden and a tester inserted into the middle of the cake comes out clean, about 45 minutes. Let cool 10 minutes then release springform and continue to cool on a wire rack. Dust with confectioners’ sugar before serving. Garnish with slices of orange if desired.