Bûche De Noël - edible Southeastern Massachusetts

Ingredients

• 1 cup all-purpose flour
• ½ cup unsweetened cocoa powder, plus 1 tablespoon, divided
• 2 tsp baking powder
• 1 tsp salt
• 8 eggs
• 1⅓ cups granulated sugar
• 1 tsp instant coffee (optional)
• ½ cup unsalted butter, melted
• 16 ounces bittersweet chocolate, chopped
• 2 cups heavy cream
• 12 ounces semi-sweet chocolate chips
• 1½ cups heavy cream