For the pies:
Preheat the oven to 375
Mix together dry ingredients and set aside
1 3/4 cups flour
3/4 cup unsweetened cocoa powder
1 1/2 teaspoons baking soda
1/2 teaspoon salt
Using mixer cream together
1/4 cup + 1 Tablespoon butter
1/2 cup granulated sugar
1/2 cup brown sugar
When that is smooth add
1 egg
beat until well mixed, and looks pale and fluffy
Combine and set aside
1 cup milk
1 teaspoon vanilla
Add half of the flour mixture to the butter mixture
Once combined add the milk & vanilla
Add the rest of the flour mixture
Line cookie sheets with parchment paper and drop mounds of dough, trying to keep the sizes uniform, onto the prepared cookie sheets.
Bake for about 12 minutes.
For the filling:
Using a mixer combine
1 1/2 cups butter
3 cups of powdered sugar
1 1/3 cups marshmallow Fluff
dash of salt
1 teaspoon vanilla
Once well combined slowly, a little at a time add milk (you may need up to 1/2 cup) to get a nice spreadable consistency.
The final step is to combine the pies with the filling. Spread filling one on cooled pie and top with another pie of equal size.
Enjoy!