Ingredients

• 3¼ cups all-purpose flour ((390g))
• 2 tablespoon instant espresso powder
• 4 teaspoon cornstarch
• 1 teaspoon baking soda
• 1 teaspoon salt
• 1¼ cups packed light brown sugar ((275g))
• ¾ cup granulated sugar ((150g))
• 1 cup unsalted butter (melted and cooled slightly (226g))
• 2 large eggs (room temperature)
• 1 tablespoon spiced rum
• 1 teaspoon vanilla extract
• 1 cup dark chocolate chips ((160g))
• ¾ cup mascarpone cheese ((170g))
• ¼ cup unsalted butter (softened (56g))
• ¼ teaspoon salt
• 1½ cups confectioners’ sugar ((180g))
• 1 tablespoon spiced rum
• ½ teaspoon vanilla extract
• Cocoa powder (for sprinkling)