INGREDIENTS
1 cup
semisweet chocolate chips
12 tbsp
butter, cut into chunks
4 oz
high quality unsweetened chocolate, chopped
1 1/2 cups
granulated sugar
3
large eggs, plus 1 egg yolk
1 tsp
vanilla
3/4 cup
all-purpose flour
1/4 tsp
salt
1 cup
chopped walnuts (optional)
1 cup
chocolate chips (optional)