Moist Caramel Coffee Cake Topped with Frosting - Cook with Carla

Ingredients

• 1/2 cup unsalted butter, softened
• 3/4 cup caramel topping (like for ice cream)
• 1 teaspoon pure vanilla extract
• 1 cup firmly packed brown sugar
• 4 teaspoons instant coffee powder
• 2 tablespoons cornstarch
• 1 cup buttermilk
• 1/4 teaspoon freshly grated nutmeg
• 1 1/2 teaspoons baking powder
• 1/2 teaspoon salt
• 1/2 teaspoon baking soda
• 2 cups plain flour
• 2 large eggs
• 1/4 cup powdered sugar
• 2 teaspoons coffee granules
• 3/4 cup semisweet chocolate, melted
• 1 tablespoon unsweetened cocoa
• 1/4 cup hot water