Prepare a 9 inch spring form pan with parchment paper
In one bowl, whisk together flour, sugar, salt, baking soda, and baking powder
In a large bowl, whisk together olive oil, milk, orange zest, orange juice, Grand Marnier, and eggs
Add dry ingredients to wet ingredients and whisk until just combined
Pour batter into prepared pan
Bake at 350°F for 1 hour until golden brown
