**Ingredients:**

For the crust:
– 2 cups all-purpose flour
– 1 teaspoon salt
– 2/3 cup cold unsalted butter, cut into cubes
– 6-8 tablespoons ice water

For the filling:
– 1 cup unsalted butter, softened
– 1 1/2 cups granulated sugar
– 4 ounces unsweetened chocolate, melted and cooled
– 1 teaspoon vanilla extract
– 4 large eggs
– Whipped cream, for topping
– Chocolate shavings, for garnish (optional)

**Instructions:**