INGREDIENTS
1 cup
unsalted butter, at room temperature
1 cup
packed light brown sugar
1/2
granulated white sugar
1
large egg
1
large egg yolk
1 tbsp
vanilla extract
2 cups
all-purpose flour
1 cup
oats
1 tsp
baking powder
1 tsp
baking soda
1 tsp
kosher salt
3 cups
semi-sweet or milk chocolate chips