Peanut butter chocolate chip cookie bars

INGREDIENTS

Egg, large

1 cup

Peanut butter, creamy

2 3/4 cups

All-purpose flour

1/2 tsp

Baking powder

1 1/2 cups

Brown sugar, light tightly packed

2 cups

Chocolate chips (semisweet or milk chocolate would work great)

1 tsp

Cornstarch

1/4 tsp

Salt

1/2 cup

Sugar

2 tsp

Vanilla extract

1 cup

Butter, unsalted

2 tbsp

Milk