Chocolate Gingerbread Bars | 5 O'Clock Coffee Club

Ingredients

• 4 tablespoons (1/2 stick) unsalted butter, melted, plus more for pan
• 1/4 cup unsweetened cocoa powder, plus more for pan
• 3/4 cup all-purpose flour, (spooned and leveled)
• 1 teaspoon ground ginger
• 1 teaspoon pumpkin-pie spice
• 1/2 teaspoon baking soda
• 1/2 cup packed dark-brown sugar
• 1/4 cup unsulfured molasses
• 1 large egg
• 1/4 cup sour cream
• 1/2 cup semisweet chocolate chips
• Confectioners' sugar, for dusting (optional)