Chocolate Pasta

• 2 cups all-purpose flour

• 3/4 cup unsweetened cocoa powder

• 3 large eggs

• 1/2 teaspoon kosher salt

• Toppings: 1 handful walnuts and toasted chocolate shavings

• 4 tablespoons butter

• 3/4 cup dark brown sugar

• 1 cup heavy cream

• 1 tablespoon orange liqueur

• 1/2 teaspoon kosher salt