Chewy Chocolate Chip Cookie Bars

INGREDIENTS

Eggs, large

2 1/4 tsp

Baking powder

2 1/8 cups

Brown sugar, firmly packed

3 cups

Chocolate chips

2 3/4 cups

King arthur all-purpose flour or king arthur white whole wheat flour, Unbleached

1 tsp

Salt

1 tsp

Vanilla extract

1/4 tsp

Butterscotch flavor or vanilla-butternut flavor

1/2 tsp

Espresso, powder

2/3 cup

Butter, unsalted