Apples:

• 2 cups diced apples heaping, about 2 medium apples
• 1 tablespoon light brown sugar
• 1 teaspoon ground cinnamon

Apple Spice Cake:

• 2 cups all-purpose flour
• 2 teaspoons baking powder
• 3/4 teaspoon salt
• 1 1/2 teaspoons ground cinnamon
• 3/4 teaspoon ground nutmeg
• 1 cup vegetable oil
• 1/2 cup packed light brown sugar
• 1 cup granulated sugar
• 3 large eggs at room temperature
• 1 teaspoon vanilla extract

Caramel:

• 1 cup granulated sugar
• 1/4 cup water
• 150 ml heavy cream at room temperature
• 1/2 cup unsalted butter at room temperature

Caramel Swiss Meringue Buttercream:

• 3 large egg whites
• 1 cup granulated sugar
• 1 cup unsalted butter cubed and at room temperature
• 1/2 cup caramel