Gingerbread Cookie Bars

Ingredients

• 2 teaspoon ground ginger
• 1 ½ teaspoon ground cinnamon
• ½ teaspoon salt
• ¼ teaspoon baking soda
• 2 ¼ cups powdered sugar
• ¼ teaspoon baking powder
• 1 teaspoon vanilla extract
• ½ teaspoon ground cloves
• 1 teaspoon cornstarch
• ¼ teaspoon nutmeg
• 6 oz cream cheese (softened)
• 1 large egg (room temperature)
• ½ tsp pure vanilla extract
• ¾ cup unsalted butter (melted)
• 2 cups + 2 Tablespoons all-purpose flour
• 1 cup dark brown sugar (firmly packed)
• ¼ cup unsulphured molasses (it should say unsulphered on the label, I used "Grandma's" brand )
• 6 Tablespoons salted butter softened
• 2 tsp cornstarch**
• Sprinkles for decorating (optional)