INGREDIENTS
1/2 lb
unsalted butter, at room temperature
1 cup
dark brown sugar, lightly packed
1 cup
granulated sugar
2
extra-large eggs, at room temperature
2 tsp
pure vanilla extract
1 1/2 cups
all-purpose flour
1 tsp
baking powder
1 tsp
ground cinnamon
1 tsp
kosher salt
3 cups
old-fashioned oatmeal
2 cups
butterscotch chips (11 ounces)
1 cup
walnuts, rough chopped