Red Velvet Whoopie pies

This is a fun Valentines Day treat because it is red and festive as well as yummers. They are amazing!   I took 2 dozen of them to my ward's valentine's enrichment and they were seriously gone in 2 minutes. This recipe comes from my Food Network Magazine again. Again, I highly recommend that magazine:)

1 ounce (2 Tbsp) semi-sweet chocolate, chopped
1/2 ounce (1 Tbsp) milk chocolate, chopped
12 Tbsp unsalted butter, melted
1/2 cup sour cream
2 large eggs
1 1/2 tsp apple cider vinegar
1/2 tsp vanilla extract
1 Tbsp red food coloring
2 1/4 cups flour
1 cup sugar
1/4 cup unsweetend cocoa powder
2 tsp baking powder
1/4 tsp baking soda
1/2 tsp salt

For the filling
8 ounces cream cheese at room temperature
3 Tbsp unsalted butter at room temp
2 1/2 cups powdered sugar
1 vanilla bean, halved lengthwise and seeds scraped (I forgot to get this so I just used 1 tsp vanilla extract)

To make the cookies:
1.Preheat the oven to 375 degrees and line 2 large baking sheets with parchment paper. Combine the semisweet and milk chocolate in a microwave safe bowl and microwave about two minutes until melted and smooth. Check on it about every 30 seconds and stir so it doesn't burn. Whisk until smooth.
2.Whisk the melted butter, sour cream, eggs, vinegar, vanilla and food coloring in a bowl until combined. In another bowl, whisk the flour, sugar, cocoa powder, baking powder, baking soda, and salt.
3.Add the flour mixture to the butter mixture in four equal batches, whisking each batch completely before adding the next. Stir in the melted chocolate.
4.Scoop heaping Tablespoonfuls of batter onto the prepared baking sheets and smooth the tops with a damp finger so that they look like smooth round mounds. Bake until the cookies spring back when lightly pressed, 8-10 minutes. (7-9 mins if using a convection oven) Let cool 10 minutes on the baking sheets, then transfer to racks to cool completely.
5.Meanwhile, make the filling: Beat the cream cheese and the butter with a mixer until smooth. Beat in the powdered sugar and vanilla seeds or extract. Sandwich a heaping Tablespoonful of filling between two cookies; repeat with the remaining cookies and filling. Refridgerate 30 minutes before serving.