Mudslide Cookies

Directions

1. 1
   Preheat the oven to 400°.
2. 2
   Line baking sheets with Silpats or parchment paper; set aside.
3. 3
   In a small bowl, sift together flour, baking powder, and salt; set aside.
4. 4
   In a heatproof bowl or the top of a double boiler set over a pot of simmering water, melt together the unsweetened and semisweet chocolates and the butter; set aside to cool.
5. 5
   In the bowl of an electric mixer fitted with the whisk attachment, beat eggs, sugar, and vanilla on medium speed until light and fluffy, about 3 minutes.
6. 6
   Add cooled, melted chocolate mixture, and combine on low speed.
7. 7
   Add flour mixture, and continue to beat on low speed until almost combined, about 1 minute.
8. 8
   Remove bowl from mixer; stir in milk chocolate by hand.
9. 9
   Using a 1/2-ounce ice-cream scoop, drop dough onto prepared baking sheets about 3 inches apart.
10. 10
    Bake until set, 12 to 15 minutes.
11. 11
    Let cookies cool completely on baking sheets.