Molten Chocolate Crackle Pie with a Gooey Fudge Center - My Home Made Recipe

Ingredients

• 1 pie crust round (homemade or store-bought).
• 1 egg, beaten, for brushing.
• Vanilla sugar or coarse sugar, for sprinkling (optional).
• 4 large eggs.
• 1 1/2 cups granulated sugar.
• 1/2 cup unsweetened cocoa powder.
• 2 teaspoons instant coffee granules.
• 1/2 teaspoon kosher salt.
• 10 tablespoons salted butter, melted.
• 1 tablespoon hazelnut liquor (optional).
• 2 teaspoons vanilla extract.
• 1/2 cup semi-sweet chocolate chips or chunks.
• 1 cup heavy cream.
• 1 tablespoon real maple syrup.