Heat your oven: Turn it to 350°F and line your muffin tin with paper liners so you're all set when the batter is ready.
Mix your dry ingredients: Whisk 1 ½ cups flour, 1 teaspoon baking powder, ½ teaspoon baking soda, ½ teaspoon salt, 1 teaspoon cinnamon, ¼ teaspoon nutmeg, and ¼ teaspoon cloves in a bowl.
Beat butter and sugar: Throw ½ cup butter, ½ cup granulated sugar, and ¼ cup brown sugar in your mixer and beat for 2 minutes until smooth and fluffy.
Add eggs and vanilla: Mix in 2 large eggs and 1 ½ teaspoons vanilla extract until everything blends together and gets lighter in color.
Start combining: Add half your flour mixture to the wet ingredients and mix gently until you barely see any flour streaks remaining.
Pour in milk: Add ⅓ cup milk and mix on low, then add the rest of the flour and stir just until combined.
Stir in apples: Use a spoon to fold in 1 cup diced or grated apple by hand so they're spread throughout the batter evenly.
Fill and bake: Scoop batter into your prepared tin, filling each cup three-quarters full, and bake for 18-20 minutes until a toothpick comes out with just a few crumbs.
Let them cool: Wait 2 minutes, then move cupcakes to a wire rack and let them cool completely before you add the frosting on top.
Prepare frosting: Beat 1 cup softened butter on high for 5 minutes until fluffy, then gradually add 2 ½ cups confectioners' sugar, 1 teaspoon cinnamon, and 2 teaspoons vanilla extract until smooth. Add 1-2 tablespoons milk slowly until the frosting is perfect for piping.
Make them pretty: Fill a piping bag with your frosting, attach a star tip, and pipe gorgeous swirls on each cooled cupcake, then add cinnamon or apple slices.