Step 1: Make the Crust

1. Preheat your oven to 350°F (175°C).

2. In a mixing bowl, stir together the flour, melted butter, sugar, and salt until a soft dough forms.

3. Press the dough evenly into the bottom of a greased 9×9-inch baking pan.

4. Bake for 15–18 minutes, or until lightly golden.

5. Let the crust cool completely before adding the filling.

Step 2: Prepare the Chocolate Filling

1. In a microwave-safe bowl, melt the chocolate chips in 30-second intervals, stirring between each, until smooth. Let cool slightly.

2. In a separate large bowl, beat the softened butter and granulated sugar until light and fluffy — about 3 minutes.

3. Add the cooled chocolate and vanilla extract, beating until fully combined.

4. Add the eggs one at a time, beating for 3 full minutes after each egg. This creates the signature light and silky texture.

5. Spread the chocolate filling evenly over the cooled crust.

Step 3: Whip and Top

1. In a chilled bowl, whip the heavy cream and powdered sugar until stiff peaks form.

2. Gently spread the whipped cream over the chocolate layer.

3. Cover and refrigerate for at least 4 hours, or overnight for best results.

Step 4: Slice and Serve

Once fully set, cut into bars with a sharp knife. Wipe between cuts for clean edges. Serve chilled.