Preheat oven to 350 degrees F, or preheat a convection oven to 315 degrees F.
In a large bowl of an electric mixer, beat the sugar, butter, and eggs together until well combined. Add the oil and vanilla and beat again.
In a separate bowl, combine all of the dry ingredients. Add half of the dry mixture to the egg mixture and beat or stir to blend. Add 1 1/2 cups milk and beat again. Add the remaining dry mixture and beat until incorporated. Add the remaining 1 1/2 cups milk and beat until blended.
With a large spoon, scoop out 32 circles of batter onto a baking sheet. Bake for 10 to 12 minutes. Let cool.
Spread filling onto 16 circles and place remaining circles on top, to make 16 Whoopie Pies.Filling:
1 1/2 cups shortening
3 cups confectioners' sugar
1 1/3 cups marshmallow topping
1 teaspoon vanilla extract
1/3 to 1/2 cup milk
In the bowl of an electric mixer, combine all ingredients except the milk and beat well. Add just enough milk to achieve a creamy consistency. Spread filling across cooled cookie circles.
Professional Recipe: This recipe was provided by a chef, restaurant or culinary professional and makes a large quantity. The Food Network Kitchens chefs have not tested this recipe in the proportions indicated and therefore cannot make any representation as to the results.
Recipe courtesy of Moody's Diner
Recipe courtesy of Giada De Laurentiis