2
Pre-heat oven to 350 degrees.
In a large mixing bowl, cream the butter and both sugars. Mix in the cocoa until well blended. Blend in the eggs and egg yolks. Pour coffee on top of batter, then add the cream of tartar, baking soda, and the salt. Mix well. Blend in the flour ( 1 cup at a time ). Stir in the pecan pieces.