Moist Caramel Apple Sheet Cake With Cinnamon - ioanacooks

Ingredients

• 1 cup unsalted butter
• 1 cup water
• 2 cups plus 2 tablespoons all-purpose flour
• 2 cups granulated sugar
• 1/2 teaspoon kosher salt
• 1 teaspoon baking soda
• 1 teaspoon cinnamon
• 1/2 cup sour cream
• 2 large eggs
• 1 medium apple, diced small or grated (about 1 1/4 cups)
• 3 tablespoons whole milk
• 1/4 cup unsalted butter
• 2 cups powdered sugar
• 1/2 teaspoon vanilla extract
• 2 tablespoons caramel sauce