The recipe I use is what came with the pan:
Whoopie Pies William Sonoma Style
1 cup all purpose flour
1/2 cup dutch process cocoa powder
1/2 tsp baking soda
1/4 tsp salt
2/3 cup firmly packed light brown sugar
6 TBS unsalted butter, room temp
34 tsp vanilla extract
1 egg, room tep
1 cup buttermilk, room temp
2 1/4 cups confectioners sugar
5 TBS unsalted butter, room temp
3 TBS milk
1 tsp vanilla extract
1/8 tsp salt
Preheat the oven to 325 degrees. Grease the pan.
I'm just going to be really honest here and say I basically put all the ingredients together in my mixer and let it go. I'm not a baker so it's hard for me to do it step by step - and well it came out totally great so....You can do however you choose!
The filling is super easy. But it's SUPER SUPER SUPER sweet, so cut back on the sugar or something if you don't like stuff that is really sweet!
Here they are all packed up to go to their new home.