Preheat the oven to 350°F (175°C) and grease a 9-inch pie dish.

In a mixing bowl, cream together the softened butter and granulated sugar until light and fluffy.

Add the eggs one at a time, beating well after each addition to ensure everything is well combined.

Mix in the fresh lemon juice, lemon zest, and whole milk until the mixture is smooth and creamy.

In another bowl, whisk together the flour, baking powder, and salt.

Gradually add the dry ingredients to the wet ingredients, mixing just until combined. Be careful not to overmix — a few lumps are okay!

Pour the batter into the prepared dish and bake for 30-35 minutes, or until the top is golden and a toothpick comes out clean when inserted into the center.

Allow the cake to cool before dusting it with powdered sugar. Slice and serve!