01 - Preheat your oven to 350°F (175°C). Line a 12-cup muffin tin with paper liners.
02 - In a large mixing bowl, whisk together the all-purpose flour, granulated sugar, baking powder, baking soda, salt, and pumpkin pie spice.
03 - In a separate bowl, whisk the vegetable oil, eggs, pumpkin purée, milk, and vanilla extract until smooth.
04 - Pour the wet ingredients into the dry ingredients. Mix gently until just combined; avoid overmixing for tender cupcakes.
05 - Divide the batter evenly among the prepared cupcake liners, filling each about two-thirds full.
06 - Bake for 18 to 22 minutes, or until a toothpick inserted into the center comes out clean. Allow the cupcakes to cool completely on a wire rack.
07 - For the frosting, beat the softened butter and cream cheese together until smooth and creamy. Gradually incorporate the powdered sugar, vanilla extract, and a pinch of salt, beating until the frosting is light and fluffy.
08 - Generously frost each cooled cupcake with the prepared cream cheese frosting.
09 - To create the rat decorations, place a chocolate truffle or donut hole on each cupcake to serve as the rat's body. Use mini chocolate chips for the eyes and a pink jelly bean for the nose. Insert two almond slices into the top for ears and attach a black licorice lace for the tail. For added detail, use edible food coloring pens if desired.