Sour Cream-Chocolate Bundt® Cake

INGREDIENTS

• 2 1/4 cups all-purpose flour
• 1 cup unsweetened cocoa powder
• 2 tsp. baking powder
• 3/4 tsp. baking soda
• 1/4 tsp. salt
• 16 Tbs. (2 sticks) unsalted butter
• 1 1/2 cups granulated sugar
• 4 eggs, lightly beaten
• 1 tsp. vanilla extract
• 1 1/2 cups sour cream
• 6 oz. bittersweet chocolate, melted and cooled slightly
• 1 cup granulated sugar
• 1/2 cup water
• 1 Tbs. chocolate liqueur
• Confectioners' sugar for dusting
• Whipped cream for serving