Chocolate Whoopie Pies with Quick Marshmallow Frosting
Prep Time: 20mins
Cook Time: 20mins
Total Time: 40mins
These Chocolate Whoopie Pies have a fluffy whipped marshmallow frosting sandwiched between two soft and cakey chocolate cookies. It's an easy sweet treat!
For the whoopie pie batter:
15ozall-purpose flour, by weight(3 cups, measured)
6ozunsweetened cocoa powder, by weight(1.5 cups, measured)
1cupunsalted butterat room temperature
2extra large eggs
2cupsbuttermilkat room temperature
1.5teaspoonspure vanilla extract
For the Seven Minute Marshmallow Frosting:
1tablespoonwhite corn syrup
1/4cupegg whites(about 2 egg whites)
1teaspoonspure vanilla extract
Preheat the oven to 400 degrees F, and line two sheet pans with silpats or parchment paper.
Sift together the flour, cocoa powder, baking soda, baking powder, and salt. Set this aside for now.
Cream together the butter and sugar until well mixed. Remember that during the creaming process, the sugar cuts little holes into the butter, and the baking soda/powder fill those holes up with gas, giving our whoopie pie cake pieces lightness and tenderness. Mix in the eggs, buttermilk, and vanilla extract until combined. The batter may look clumpy and soupy but that’s okay. Slowly mix in the dry ingredients until there are no more flour streaks, but take care not to overmix the batter. It will have lumps, and that’s fine.
Use a medium cookie scoop or disher to portion our 12 scoops of batter onto each sheet pan. Bake them in the center of the oven for 10 minutes, then let them cool.
To make the frosting, set up a double boiler (a heatproof bowl set in a saucepan with an inch of simmering water in it, make sure the water doesn’t touch the bowl), and add the sugar, corn syrup, egg whites, and salt. Using a hand mixer on medium speed, whip the mixture for exactly 7 minutes. It will be thick and glossy by the end of the cooking process. Whip in the vanilla extract, then let it cool.
To assemble the whoopie pies, place a scoop of the frosting in between two whoopie pie halves. Serve and enjoy!
Recipe note: If you like lots of filling in your whoopie pies, you will likely need to make two batches of frosting. I don’t recommend doubling the filling recipe and making it in one batch because it will probably be too much volume for the bowl, and the egg whites won’t get to cook to 165 if there’s too much in there.