Preheat your oven to 350°F (175°C). Grease your 9-inch pan and line the bottom with parchment paper. This prevents sticking and ensures easy removal.
In a large bowl, whisk ricotta and sugar until smooth and fluffy. I love watching it turn light and creamy—it’s the secret to that cloud-like texture.
Beat in the eggs one at a time, then stir in melted butter, lemon zest, lemon juice, and vanilla. This combination gives the cake its fragrant, citrusy base.
Whisk together flour, baking powder, and salt separately. Gently fold into the wet mixture until just combined to keep the cake light.
Add the chopped pistachios carefully. I like to toast mine first—it enhances their nuttiness and adds a little crunch.
Pour batter into the prepared pan and smooth the top. Bake 30–35 minutes until golden and a toothpick comes out clean. The aroma of lemon and butter fills the kitchen beautifully!
Let the cake cool in the pan for 10 minutes, then transfer to a wire rack. Dust with powdered sugar and sprinkle extra pistachios before serving for a stunning presentation.