Peanut Butter Cookie Bars

stack of peanut butter chocolate chip cookie bars

These soft & chewy peanut butter chocolate chip cookie bars are easy to make in a 9x13 pan! Add your favorite chocolate chips and mix-ins for the ultimate crowd pleaser!

Course Dessert

Cuisine Cookie

Keyword peanut butter chocolate chip cookie bars

Prep Time 10

Cook Time 14

Total Time 30

Servings

Calories 346kcal

Author Melissa Rose

Ingredients

½ cup unsalted butter (i.e. 1 stick) softened
¾ cup light brown sugar
¼ cup granulated sugar
¾ cup creamy peanut butter do not use natural peanut butter, as it will result in a cookie that is too soft
1 large egg
1 egg yolk (you will be using 1 whole egg + 1 extra egg yolk)
1 teaspoon vanilla extract
½ teaspoon baking soda
¼ teaspoon salt
1 ½ cups all-purpose flour
1 tablespoon cornstarch
½ cup semi-sweet chocolate chips + extra for garnish
½ cup peanut butter chips + extra for garnish

Instructions

Preheat oven to 350ºF. While preheating, be sure to read tips & tricks in post above for recipe sucess.
In a large mixing bowl, beat together ½ cup unsalted butter (i.e. 1 stick), ¾ cup light brown sugar, and ¼ cup granulated sugar on medium speed for 30-60 seconds, or until combined. Mix in ¾ cup creamy peanut butter.
Stir in the 1 large egg, 1 egg yolk, and 1 teaspoon vanilla extract, followed by the ½ teaspoon baking soda and ¼ teaspoon salt.
Add 1 ½ cups all-purpose flour and 1 tablespoon cornstarch and mix until combined.
Add ½ cup semi-sweet chocolate chips and ½ cup peanut butter chips. Mix the dough until well-combined.
Generously grease and line a light-colored metal 9x13 pan with parchment paper. Spread dough into an even layer in pan. If desired, press a few extra chocolate chips on the top for added presentation.
Bake for 14-16 minutes, or until edges are slightly golden brown. Do not overbake; it might look a little under-baked, but the residual heat from the pan will continue to bake the cookie even after you take it out of the oven.
Cool completely before cutting - this is important! If you cut while they are warm, they will crumble.
Store in an airtight container for 3-4 days or freeze up to 1 month.

Notes

Nutrition information is calculated using an ingredient database and should be considered an estimate. Based on 12 bars.

Nutrition