In a microwave-safe bowl, pour the unsweetened chocolate, butter, and 1 cup of the semisweet chips.
Place in the microwave, using the defrost setting, for two minutes.
Remove and stir. Repeat this process until smooth. Set aside to cool.
In a large bowl, whip eggs and sugar until thick. Stir in the vanilla and the melted chocolate, until well mixed.
In a separate bowl, combine the flour, cocoa, baking powder and salt. Gradually stir the dry ingredients into the chocolate mixture. Fold in remaining chocolate chips.
Cover dough and chill for at least one hour. Preheat oven to 350°.
Roll the chilled dough into one-inch balls. Place on an ungreased cookie sheet, about two inches apart, and bake for 9 to 11 minutes. Allow to cool for a few minutes on the cookie sheets before removing.
