Heat the oven to 350°F with racks in the upper- and lower-middle positions. Line 2 baking sheets with kitchen parchment. Put the milk chocolate in a medium microwave-safe bowl. Microwave on 50 percent power, stirring every 30 seconds, until completely smooth and melted. Set aside. In a medium bowl, whisk together the flour, sugar, cocoa powder and salt. Add eggs and mix thoroughly with a rubber spatula. Stir in the melted chocolate, almond butter, vanilla and chopped semi-sweet chocolate.