Preheat the oven to 350 degrees F (175 degrees C). Prepare a 9-inch springform pan with olive oil and a lining of parchment paper.
In a medium bowl, whisk together eggs, olive oil, and sugar until smooth. Then whisk in milk, Amaro, orange zest, lemon juice, lemon zest, and vanilla.
In a separate large bowl, mix all the dry ingredients: flour, baking soda, baking powder, and salt. Make a well in the center of the dry ingredients and slowly incorporate the wet ingredients. Whisk until smooth—a few lumps are okay!
Pour the batter into the prepared pan. Sprinkle the Sugar in the Raw over the top and bake for about 50 minutes to 1 hour.
Let the cake cool completely before dusting with powdered sugar and topping with a scrape of lemon zest.
