2cupsall-purpose flour9 ounces – fluffed up before measuring, don’t scoop or pack**
1 ½cupssemisweet chocolate chunks
Ganache:
1 ½cupssemisweet chocolate chunks9 oz
½cupheavy cream
1tablespoonunsalted buttersoftened
Instructions
Preheat oven to 350 degrees F. Line a 13x9 inch metal pan with foil and spray bottom with cooking spray or rub with butter.
Cream the butter and sugar with an electric mixer. When light and fluffy, add peanut butter and beat until incorporated. Beat in eggs, the egg yolk, salt and vanilla. By hand, stir in the flour and chocolate chips. Spread batter in pan, patting it down flat, and bake on center rack for 35-40 minutes or until puffed and golden. Cool completely.
Make the ganache. Put the chocolate chips in a heat-proof bowl. In a saucepan or in a microwave-safe measuring cup, heat the cream until starts to boil. Pour the cream over the chips and let stand for a minute. Stir well to melt chips; stir in the butter. Spread on cooled brownies and let set.
Makes 36 bars
Notes
For best results, weigh the flour. If you measure by volume, pour the flour in a bowl and stir it so that it is fluffy and not at all packed. Too much flour contributes to dryness.