1 1/2 cups (12 ounces) canned 100 percent pure pumpkin (recommended: Libby's)
2 cups vanilla cake mix (recommended: Betty Crocker Super Moist French Vanilla)
1/2 cup whole milk, at room temperature
1/4 cup vegetable oil
2 eggs, at room temperature
2 teaspoons pumpkin pie spice
1 cup powdered sugar
1/2 cup cream cheese, at room temperature
1/2 stick unsalted butter, at room temperature
1/2 cup unsweetened cocoa powder
1/4 cup sour cream
To decorate: mini-chocolate chips, sprinkles, colored sugar, small candies.
The batter can also be spooned into 12 regular-sized cupcake molds and baked in a preheated 350 degree F oven for 20 to 25 minutes.