01 - Preheat oven to 350°F. Line a 12-cup muffin tin with cupcake liners.
02 - In a medium bowl, whisk together flour, baking powder, baking soda, salt, cinnamon, nutmeg, ginger, cloves, and cocoa powder. Set aside.
03 - In a large bowl, whisk melted butter and sugar until smooth. Beat in eggs, one at a time. Stir in pumpkin puree, milk, and vanilla extract.
04 - Gradually fold the dry ingredients into the wet mixture until just combined; do not overmix.
05 - Gently fold in chocolate chips, chopped nuts (if using), and crushed pretzels for a crunchy surprise.
06 - Divide batter evenly among cupcake liners, filling each about 2/3 full.
07 - Bake for 18–22 minutes, or until a toothpick inserted in the center comes out clean. Let cool in pan for 5 minutes, then transfer to a wire rack to cool completely.
08 - Beat cream cheese and butter until creamy. Gradually add powdered sugar, then vanilla and salt. Beat until fluffy.
09 - Frost cooled cupcakes generously. Dust with pumpkin pie spice if desired.