INGREDIENTS
1/2 cup
plus 3 tablespoons all-purpose flour
1 tbsp
baking powder
1/8 tsp
kosher salt
6 oz
unsweetened chocolate
16 oz
bittersweet chocolate
6 tbsp
unsalted butter, cubed and room temperature
2 1/4 cups
plus 1 tablespoon granulated sugar
5
eggs, room temperature
1 1/4 cups
plus 1 tablespoon walnuts, chopped
16 oz
bittersweet chocolate, chopped
fleur de sel or sea salt, for sprinkling
*parchment paper, for lining the baking sheets (I tried just using just non-stick spray and then tin foil with non-stick spray, but I found that parchment paper with a little non-stick spray worked best for these)