INGREDIENTS
1 1/4 cups
{2 1/2 sticks) unsalted butter, plus more for pan
2 1/4 cups
all-purpose flour, plus more for pan
1 1/2 tsp
baking powder
1 1/2 tsp
salt
2 cups
packed light-brown sugar
1/2 cup
granulated sugar
3
large eggs
2 1/2 tsp
pure vanilla extract
1 cup
butterscotch chips