# Components:
→ Cake Batter
01 - 2 cups all-purpose flour
02 - 1 ½ teaspoons baking powder
03 - ½ teaspoon baking soda
04 - 1 teaspoon ground cinnamon
05 - ½ teaspoon ground nutmeg
06 - ½ teaspoon salt
07 - ½ cup unsalted butter, softened
08 - ¾ cup granulated sugar
09 - ¼ cup light brown sugar, packed
10 - 2 large eggs, room temperature
11 - 1 teaspoon vanilla extract
12 - ½ cup sour cream, room temperature
13 - 1 cup apple cider, reduced to ½ cup
14 - 1 medium apple, peeled and grated
→ Sugar Rubble Topping
15 - ¾ cup granulated sugar
16 - 1 tablespoon ground cinnamon
17 - 2 tablespoons unsalted butter, melted
18 - Pinch of salt
# Directions:
01 - Preheat oven to 350°F (175°C). Grease and line a 9x13-inch sheet pan with parchment paper.
02 - In a small saucepan, simmer apple cider over medium heat until it reduces to ½ cup. Allow it to cool to room temperature.
03 - In a medium bowl, whisk together the all-purpose flour, baking powder, baking soda, ground cinnamon, ground nutmeg, and salt.
04 - In a large bowl, cream the softened butter with granulated sugar and light brown sugar until the mixture is light and fluffy. Beat in the eggs one at a time, then incorporate the vanilla extract.
05 - Mix in the sour cream and the reduced apple cider until the ingredients are well combined.
06 - Add the dry ingredients to the wet mixture and gently fold them together until just combined. Stir in the grated apple.
07 - Spread the batter evenly into the prepared sheet pan. Bake for 28–32 minutes, or until a toothpick inserted into the center emerges clean. Let the cake cool in the pan on a wire rack.
08 - For the sugar rubble, combine granulated sugar, ground cinnamon, melted butter, and a pinch of salt in a bowl. Mix until the mixture becomes crumbly and resembles wet sand.
09 - Generously sprinkle the sugar rubble over the cooled cake, pressing lightly to help it adhere. Cut into squares to serve.