Classic quick and easy chocolate whoopie pie recipe with creamy marshmallow filling. Soft, moist, made with simple ingredients. Starts off with cake mix box.
In a large mixing bowl, add butter, eggs, sour cream and mix until smooth.Add cake mix and mix until just combined.
Use a small ice cream scooper to scoop out small portions of the dough onto a cookie tray, lined with parchment paper. You should be able to make about 24 small cookies.
Chill in the freezer for 20 minutes.
Bake at 350 degrees F for about 10 minutes or until cookies are slightly cracked on top and firm around the edges.
Allow the cookies to cool completely to room temperature.
While the cookies are cooling, prepare the marshmallow frosting.
Attach a large round tip to a piping bag and fill it with this frosting.
Flip half the cookies and top them with a swirl of frosting.
Place another cookie on top and press gently to secure the two cookies together into a sandwich. Enjoy!
Notes
Use full fat ingredients.
Make sure all ingredients are at room temperature.
To prevent cookies from sticking to pan, make sure it's lined with parchment paper.
Use unsalted butter to keep these from becoming too salty.
Try other flavors of cake mixes.
Read additional tips and variations above.
Leftovers can be stored in a sealed container in the fridge for up to 3 days.