Chocolate Chip Peanut Butter Bars

Bahan-bahan (16 porsi)

• 6 tablespoons (¾ stick) unsalted butter
• ½ cup peanut butter ((smooth or chunky))
• 1 cup granulated white sugar
• ¼ cup packed light brown sugar
• 2 large eggs
• 1½ teaspoons vanilla extract
• 1 cup all purpose flour
• ¼ teaspoon salt
• 1 teaspoon baking powder
• 1 cup chocolate chips ((plus a few extra to sprinkle on top))