Ingredients

• 8 ounces dark chocolate
• 1/4 cup cocoa powder
• 1 tablespoon espresso powder
• 1 1/4 cups butter
• 1/2 cup packed dark brown sugar
• 1/2 cup organic cane sugar
• 2 teaspoons vanilla extract
• 2 teaspoons salt
• 6 eggs
• 1 cup all-purpose flour
• 1/2 cup cocoa powder
• Sea salt (optional)