These adorable little sandwich cookies, otherwise known as chocolate whoopie pies, are cookies made with a cake-like consistency filled with a luscious cream cheese frosting!
Preheat oven to 350°F. Line a baking sheet with parchment paper and set aside. In a small heavy bottom pot, melt the butter and chocolate chips over medium heat. Remove from heat and set aside to cool slightly.
In a medium sized bowl, whisk or sift together the flour, cocoa, baking powder, baking soda and salt.
In a large bowl, whisk together the sugar, eggs, sour cream, vinegar and vanilla. Then add in the flour mixture and mix until combined. Do not over mix.
Use a medium cookie scoop or Tablespoon to drop the cookies onto the pan about 1 1/2 inches apart. Bake for 10 to 12 minutes, or until the centers no longer look wet. Allow them to cool on the pan for a couple minutes and then transfer to a cooling rack.
Frosting
While the cookies are cooling, whip up your cream cheese frosting. Beat the butter in a large bowl with an electric mixer. Once smooth, beat in the cream cheese. Then slowly add in the powdered sugar and vanilla and mix until smooth. Add a pinch of salt if desired. Set aside until cookies have cooled.
Once the cookies have cooled, frost the BOTTOM of the cookies (generously) and then grab another cookie to put on top and gently press the two cookies together.
Notes
Storage: Store leftover cookies in a covered container up to 3 days in the refrigerator. In my opinion, they taste even better the next day.Freeze up to 3 months. Remove from the freezer a couple hours before serving to thaw.