Ingredients:

• 1/4 cup salted butter, softened
• 1/2 cup brown sugar
• 1/2 cup all-purpose flour
• 1 teaspoon cinnamon
• 1/2 teaspoon nutmeg
• 1/3 cup finely chopped pecans, optional
• For the batter
• 1 1/2 cups plus 2 tablespoons all-purpose flour, divided
• 2 teaspoons baking powder
• 1/4 teaspoon baking soda
• 1 teaspoon cinnamon
• 1/4 teaspoon nutmeg
• 1/4 teaspoon salt
• 1/3 cup brown sugar, lightly packed
• 2 large eggs
• 1/2 cup sour cream
• 1/3 cup plus 3 tablespoons unsalted butter, melted, divided
• 1/4 cup whole milk
• 2 teaspoons vanilla extract
• 2 Granny Smith apples, peeled, cored, and chopped into 1/2-inch pieces
• For the glaze
• 1 1/2 cups powdered sugar
• 1 teaspoon vanilla extract
• 2 to 3 tablespoons whole milk