Ingredients
For the Cake:
1 teaspoon baking powder
½ teaspoon baking soda
½ teaspoon salt
1 teaspoon ground cinnamon
½ teaspoon ground nutmeg
½ cup unsalted butter, softened
¾ cup granulated sugar
2 large eggs
1 teaspoon vanilla extract
½ cup sour cream (or Greek yogurt)
1 ½ cups apples, peeled and diced (Honeycrisp, Granny Smith, or your favorite)
For the Crumble Topping:
½ cup all-purpose flour
⅓ cup brown sugar
1 teaspoon ground cinnamon
¼ teaspoon salt
¼ cup unsalted butter, melted
For the Glaze (Optional):
½ cup powdered sugar
1 tablespoon milk
½ teaspoon vanilla extract