Step #1 Center a rack in the oven & preheat to 350°F
Spray the inside of an 8-cavity 2" heart-shaped silicone pan with non-stick spray & place on a baking sheet.
Step #2 Melt the sliced chocolate & butter in a microwave-safe bowl on low power for 30-second bursts.
Step #3 Stir after each burst.
Step #4 Use an electric mixer to beat the egg & yolk in a bowl until frothy.
Step #5 Add the sugars & whip until very thick & pale colored, about 5 mins.
Step #6 Add the melted chocolate mixture & mix completely.
Step #7 Sift together the flour & cocoa powder & add the salt.
Step #8 Add to the mixture in 3 stages, mixing well after each addition.
Step #9 Stir in the walnuts.
Step #10 Divide batter evenly among cavities of the pan.
Step #11 Bake 35 mins, until a tester comes out slightly moist.
Step #12 Remove from the oven & cool the pan on a rack.
Step #13 Turn the pan upside-down & carefully peel away from the brownies, then turn brownies top-side up.
Step #14 Store in a single layer in a tightly sealed container or covered with foil wrap at about room temp up to 5 days.
Enjoy the Bittersweet Chocolate & Walnut Brownies recipe