In a medium bowl whisk together the flour, baking powder, and salt and set aside. In the bowl of a stand mixer or in a large bowl using a hand mixer, add the butter and sugar and beat until light and fluffy, about 1-2 minutes. Beat in the eggs one at a time on low speed until combined. Turn the mixer off and add in the vanilla, milk, ricotta cheese, and orange zest. Mix on low until just combined. Add in the flour mixture and pulse until just combined and no flour pockets remain.