01 - Preheat the oven to 350°F. Line a 12-cup muffin tin with cupcake liners.
02 - In a large bowl, whisk together flour, granulated sugar, brown sugar, baking soda, baking powder, salt, and pumpkin pie spice.
03 - In a separate bowl, whisk together oil, eggs, pumpkin purée, buttermilk, and vanilla extract until smooth.
04 - Add the wet ingredients to the dry ingredients and gently mix until just combined. Do not overmix.
05 - Divide the batter evenly among cupcake liners, filling each about 2/3 full.
06 - Bake for 20-22 minutes, or until a toothpick inserted into the center comes out clean. Cool in the pan for 5 minutes, then transfer to a wire rack to cool completely.
07 - In a medium bowl, beat the cream cheese and butter until creamy. Gradually add powdered sugar, then add vanilla, cinnamon, and a pinch of salt. Beat until light and fluffy.
08 - Once cupcakes are completely cool, frost generously using a piping bag or spatula.
09 - Decorate with candy eyes, sprinkles, or pumpkin seeds for a playful "disaster" effect.