I also made these for Miss V's Halloween party. I was afraid that 24 cupcakes would be enough, so I made a dozen from a recipe on the Joy of Baking Site.
1/2 cup (113 grams) unsalted butter, room temperature
2/3 cup (130 grams) granulated white sugar
3 large eggs
1 teaspoon pure vanilla extract
Zest of 1 large lemon (outer yellow skin)
1 1/2 cups (195 grams) all purpose flour
1 1/2 teaspoons baking powder
1/4 teaspoon salt
1/4 cup (60 ml) milk
Vanilla Cupcakes: Preheat oven to 350 degrees F (177 degrees C) and line 12 muffin cups with paper liners.
In the bowl of your electric mixer, or with a hand mixer, beat the butter and sugar until light and fluffy. Add the eggs, one at a time, beating well after each addition. Beat in the vanilla extract and lemon zest.
In a separate bowl whisk together the flour, baking powder, and salt.
With the mixer on low speed, alternately add the flour mixture and milk, in three additions, beginning and ending with the flour. Scrape down the sides of the bowl as needed.
Evenly fill the muffin cups with the batter and bake for about 18-20 minutes or until nicely browned and a toothpick inserted into a cupcake comes out clean. Remove from oven and place on a wire rack to cool. Once the cupcakes have completely cooled, frost with icing. If you want flat topped cupcakes then slice off the dome of each cupcake, with a sharp knife, before frosting.
Makes about 12 cupcakes
I frosted them with a canned milk chocolate frosting. I used some fall sprinkles from Wilton and used a tube of Wilton Black icing to make the faces on the marshmellows.