Peanut Butter Chocolate Chip Bars

• ▢ 
  
• ▢ 1 cup creamy peanut butter
• 1 cup softened butter
• ▢ 1 ½ cups brown sugar, packed
• ▢ ½ cup sugar
• ▢ 1 large egg + 1 Egg Yolk
• ▢ 2 teaspoons vanilla extract
• ▢ 2 ¾ cups all-purpose flour
• ▢ 1 teaspoon cornstarch
• ▢ ½ teaspoon baking powder
• ▢ ¼ teaspoon salt
• ▢ 2 tablespoons milk
• ▢ 2 cups chocolate chips 

• Preheat oven to 350°F and spray a 9×13 pan. 
• Using an electric mixer, cream together butter, peanut butter, and sugars until well combined.
• Add egg, egg yolk, and vanilla extract and stir well.
• In a separate bowl, whisk together flour, cornstarch, baking powder, and salt until well combined.
• Gradually add flour mixture to butter mixture until completely combined.
• Add milk and stir again until mixture is well incorporated.
• Fold in chocolate chips.
• Transfer batter to prepared pan and use a spatula to spread it evenly into pan.
• Bake on 350F for 30 minutes or until edges are just beginning to turn golden brown and a toothpick inserted in the center comes out clean or with few moist crumbs.
• Allow to cool before cutting and serving.