Preheat your oven to 350°F (175°C) and prepare a 9-inch round cake pan by greasing it with butter and dusting with flour.

In a large mixing bowl, combine ricotta cheese, limoncello, granulated sugar, and softened unsalted butter. Beat on medium speed for 2-3 minutes until smooth.

Add the eggs and vanilla extract, mixing for another 2 minutes until fully combined.

In a separate bowl, whisk together flour, baking powder, salt, and lemon zest until evenly combined.

Gradually fold the dry mixture into the wet ingredients until just combined.

Pour the batter into the prepared cake pan and smooth the top. Bake in the oven for about 35 minutes.

Allow the cake to cool in the pan for 10 minutes before transferring to a wire rack to cool completely.

Once cooled, dust with powdered sugar and serve with fresh berries if desired.