Combine 1 package chocolate chips and butter in large microwabable bowl. Microwave on HIGH 30 seconds; stir. Repeat as necessary until chips are melted and mixture is smooth. Beat eggs and vanilla in large bowl with electric mixer at medium speed until blended and frothy. Add sugar; beat until thick and light. Add chocolate mixture; beat until blended. Combine flour, cocoa, baking powder and salt in medium bowl; add to butter mixture. Beat until blended. Stir in remaining package chocolate chips. (Dough will be soft.)
|