INGREDIENTS
1 cup
all-purpose flour
1/2 cup
whole-wheat flour
1 tsp
coarse salt
1/2 tsp
baking soda
3/4 cup
unsalted butter, softened
1/2 cup
granulated sugar
1/2 cup
packed light-brown sugar
1
large egg
1 1/2 tsp
pure vanilla extract
1/2 cup
mashed ripe banana (about 1 large)
1 cup
old-fashioned rolled oats
8 oz
semisweet chocolate chunks
1/2 cup
coarsely chopped walnuts