Step 1

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.

Step 2

Spread the almonds on a large plate. Divide the dough into 1-tablespoon balls, then lightly press into the almonds to coat one side and slightly flatten them. Arrange 15 of the balls, almond side up, on each of the prepared baking sheets about 2 inches apart. Brush the tops lightly with the egg white and sprinkle with sea salt.

Step 3

Bake until the center is set and the edges are no longer glossy, 10 to 13 minutes, rotating the sheets and switching racks halfway through. Let cool completely on the sheets. Store in an airtight container at room temperature for up to 5 days.