Kue Gingerbread Hangat dengan Saus Karamel

Bahan-bahan (9 porsi)

• 9 tablespoons butter (softened)
• 1/3 cup sugar
• 1 cup molasses
• 1 large egg
• 2 -1/4 cups all-purpose flour
• 1 teaspoon baking soda
• 1 teaspoon ground ginger
• 1 teaspoon ground cinnamon
• 1/4 teaspoon salt
• 3/4 cup water
• 1 cup brown sugar (packed)
• 1 tablespoon plus 2 teaspoons cornstarch
• 1 cup cold water
• 1/4 cup butter (cubed)
• 1 teaspoon vanilla extract
• heavy whipped cream (optional)