INGREDIENTS
1 cup
(2 sticks, 8 ounces, 225 g) unsalted butter
2 1/2 cups
all purpose flour
1 tsp
salt
1 tsp
baking soda
1/2 tsp
cinnamon
1 cup
brown sugar, packed
1/2 cup
white sugar
2
eggs
1 tsp
vanilla extract
9 oz
milk chocolate (or semi-sweet or dark if you prefer) bars, roughly chopped into chunks, about 2 cups
1 cup
chopped walnuts or pecans (optional)