½ cup chunky natural peanut butter
1 cup sugar
2 teaspoons vanilla
1 cup unbleached all-purpose flour
1 teaspoon baking powder
½ teaspoon salt
12 ounces semisweet chocolate chips
1. Preheat oven to 350°F.
2. Generously oil a 13 x 9 x 2-inch baking pan with cooking spray.
3. In a large bowl, combine the butter, peanut butter and sugar. Whisk until well combined. Add the eggs and vanilla and whisk until smooth. Stir in the flour, baking powder and salt and combine until well blended. Fold in the chocolate chips. Transfer the mixture to the prepared baking pan.
4. Bake for 25 minutes. Allow the bars to cool before cutting into squares.
32 (2 x 2-inch) squares