Making Classic Cannoli Squares is a straightforward process if you follow these easy steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Grease a 9×9 inch baking pan and set it aside.
2. Prepare the Crust: In a large mixing bowl, combine flour, granulated sugar, baking powder, and salt. Add the cold butter and mix until the mixture resembles coarse crumbs.
3. Add Wet Ingredients: Stir in the egg and vanilla extract. Gradually add cold water, one tablespoon at a time, until the dough comes together.
4. Roll Out Crust: On a floured surface, roll out the dough into a rectangle that fits the bottom of your prepared pan. Press the dough into the pan evenly.
5. Bake the Crust: Place the crust in the preheated oven and bake for 25-30 minutes, or until lightly golden. Remove from the oven and allow it to cool slightly.
6. Prepare the Filling: While the crust cools, combine ricotta cheese, powdered sugar, vanilla extract, and citrus zest in a mixing bowl. Use a hand mixer to blend until smooth.
7. Add Chocolate Chips: Fold in the mini chocolate chips gently, mixing just enough to distribute them.
8. Assemble: Spread the ricotta mixture evenly over the cooled crust in the pan.
9. Chill: Cover the pan with plastic wrap and refrigerate for at least 1 hour to allow the flavors to meld.
10. Slice and Serve: Once chilled, dust with additional powdered sugar, if desired, and cut into squares to serve.

These steps will guide you in crafting these delicious Classic Cannoli Squares effortlessly.