30min · 18 servings For the Cake 2/3 cup vegetable oil 1/3 cup unsalted butter room temperature 1 1/2 cups granulated sugar 3 large eggs 2 3/4 cups all purpose flour sifted 1 1/2 tsp baking powder 1 tsp salt 1/2 tsp baking soda 1 1/4 cup sour cream 1/3 cup whole milk 1 tbsp fresh lemon zest 1 1/2 tsp lemon extract 1 tsp vanilla extract For the Frosting 1 cup unsalted butter room temperature 8 oz cream cheese room temperature 4 cups confectioner's sugar 2 tsp heavy whipping cream 2 tsp vanilla extract 2 tsp lemon extract pinch of salt