Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.
In a medium bowl, whisk together the flour, baking powder, baking soda, and kosher salt. Set aside.
In a large mixing bowl, cream the butter and granulated sugar together until light and fluffy, about 3-4 minutes. You can use a hand mixer or stand mixer for this step.
Add the egg, ricotta cheese, lemon zest, and vanilla extract to the butter mixture, and mix until everything is well combined.
Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Be careful not to overmix!
Fold in the ½ cup mini chocolate chips gently, ensuring they're evenly distributed throughout the dough.
Drop rounded tablespoons of dough onto the prepared baking sheet, spacing them about 2 inches apart.
Bake for 10-12 minutes or until the edges are lightly golden. Let the cookies cool on the baking sheet for 5 minutes before transferring them to a wire rack to cool completely.
While the cookies cool, melt the remaining ½ cup mini chocolate chips in the microwave, stirring every 30 seconds until smooth. Drizzle the melted chocolate over the cooled cookies.
Garnish each cookie with crushed pistachios and a light dusting of powdered sugar.