INGREDIENTS
1 1/2 sticks
unsalted butter, melted and cooled, plus more for the pan
1 1/2 cups
all-purpose flour
1 tsp
baking powder
1/2 tsp
kosher salt
1 1/2 cups
packed dark brown sugar
1 tbsp
vanilla extract
2
large eggs, lightly beaten
1/2 cup
toasted walnuts, coarsely chopped
1 cup
plus 2 tablespoons bittersweet chocolate chips
Flaky sea salt, to garnish