
Preheat the oven to 375℉ and line two baking sheets with parchment paper.
In a large bowl of an electric mixer, cream together the butter and sugar until fluffy, about 6-8 minutes. Beat in the eggs, sour cream, red food coloring, vinegar, and pure vanilla.
In another large bowl, whisk together the flour, cocoa, baking powder, salt, and baking soda.
Slowly beat the flour mixture into the batter. Then stir in the cooled semi-sweet chocolate.
Drop the dough (about 1 Tablespoon per cookie) onto the baking sheets, at least 2" apart. Bake for 8-10 minutes or until the edges are set but the middle is still spongy. Remove from the oven and allow the cookies to cool on the pans for 2 minutes. Then move the cookies to wire racks to cool completely.
Make sure you have an even number of cookies to make the sandwiches!!
in another large bowl, beat together the cream cheese and butter until fluffy. Beat in the confectioners' sugar and pure vanilla. Mix until smooth. spread the filling on the bottom halves of the cookies. Cover with remaining cookies.
Drizzle the cookies with the melted chocolate and top with the chopped pecans.
Refrigerate the cookies until serving and afterwards.