1Melt chocolates and butter together; set aside.
2Combine eggs, sugar, espresso and vanilla. Sift together flour, baking powder and salt. Whisk chocolates and butter together. Then gently fold in egg mixture followed by flour mixture.
3Add chocolate chips and fold completely. Do not overmix batter.
4Drop by teaspoonfuls onto a T-Fal Patisserie 13- x 16-inch nonstick cookie sheet.
5Bake in preheated 325°F oven for 12 to 15 minutes or until puffed and cracked.
Note: For variety, decrease volume of chocolate chips by half and substitute chopped walnuts
source: Family Features