1. Prepare the Crust:

1. Preheat oven to 350°F (175°C). Grease and flour a 9-inch round cake pan.
2. In a bowl, whisk together flour, baking powder, and salt. Set aside.
3. In a large bowl, beat butter and sugar until light and fluffy. Add eggs one at a time, beating well after each addition.
4. Mix in milk, limoncello, lemon zest, and lemon juice until combined.
5. Gradually add the dry ingredients to the wet mixture, stirring until just incorporated.
6. Pour batter into the prepared pan and bake for 30-35 minutes, or until a toothpick inserted comes out clean.
7. Let the cake cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.