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Home » Recipes » Cookies and Bars

Peanut Butter Chocolate Chip Bars

Published: Sep 17, 2025 by Kitchen Ready Betty · This post may contain affiliate links · 2 Comments

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Peanut Butter Chocolate Chip Bars will melt in your mouth with their buttery crisp edges and soft and chewy center. Loaded with crunchy Reese's Pieces and gooey chocolate chips, each bite is peanut butter chocolate bliss. These easy to make, decadent and dreamy cookie bars are perfect for get togethers, potlucks, or just because 😉.

peanut butter chocolate chip cookie bars

Is there anything better than a gooey, moist and chewy cookie bar?

Once you try these peanut butter and chocolate chip bars, I think you will agree with me that there's nothing better. NOTHING!

These wonderfully buttery, sinfully rich bars are a chocolate peanut butter lover's dream. With Reese's Pieces and gooey chocolate chips, each scrumptious bite is pure joy.

peanut butter chocolate chip cookie bars

But I must warn you: these oh-so-tasty bars are a little dangerous. They are seriously addictive. So soft and satisfying, with melt in your mouth decadence, it's really hard to eat just one (or two)!

This tasty recipe was inspired by my Mini Egg Cookie Bars--a buttery, chocolaty spring time hit, and Peanut Butter Butterscotch Blondies.

Jump to:
  • 👪Why you'll love it
  • 🥘Ingredients
  • 🔪Instructions
  • 📖Variations
  • 🍽Equipment
  • 🍶Storage
  • 💭Top tip
  • 🥄Related
  • 🍴Pairing
  • 📋Recipe with step-by-step instructions
  • 💬 Comments

👪Why you'll love it

Winning flavor combo- anyone who loves chocolate and peanut butter together will instantly crave these gooey cookie bars, that are loaded with Reese's Pieces and chocolate chips!

Easy recipe- these cookie bars are made from scratch, but they are incredibly easy to whip together and use basic ingredients that you most likely already have on hand.

Great cookie taste without the hassle- when you make cookie bars, the entire batter goes into the pan and bakes as one! No scooping or multiple pans needed!

🥘Ingredients

ingredients
  • butter- the key to creamy, melt in your mouth, cookie bars
  • brown sugar- firmly pack it for best results; you can use light or dark brown
  • eggs- room temperature eggs are best because they mix better with the ingredients
  • pure vanilla extract- this is much richer and more flavorful that imitation vanilla extract
  • all-purpose flour- gently spoon into your measuring cup and then level it with a knife for best results
  • baking powder & salt- leavening agents to make these dense cookie bars rise ever so slightly
  • Reese's Pieces & chocolate chips- you may choose to save a few to press into the top before baking

See recipe card for quantities.

🔪Instructions

butter and sugar
  1. Step 1: Melt the butter, then mix with the brown sugar, eggs, and vanilla.
dry and wet ingredients combined
  1. Step 2: Mix the dry ingredients in a separate bowl; then add to butter mixture bowl. Stir until just combined.
adding chocolate and pieces
  1. Step 3: Stir in Reese's Pieces and chocolate chips until just combined.
before baking in pan
  1. Step 4: Bake in a 13x9 pan for 20-22 minutes. Allow to cool slightly before cutting into squares.

Hint: Stir until JUST COMBINED (it's okay if the batter is a little lumpy). If you over stir, it will become too cake-like.

📖Variations

  • M&M's reverse- Use M&M's and peanut butter chips instead for a candy flavor reversal!
  • With nuts- add ½ crushed walnuts to the batter when you add the candy.

See Mini Eggs Cookie Bars for a spring version featuring Cadbury Mini Eggs!

🍽Equipment

  • 13x9 nonstick metal pan, lined with parchment paper for easy removal
  • large microwaveable mixing bowl
  • medium mixing bowl
  • measuring cups
  • measuring spoons
  • mixing spoon
  • whisk
  • scraping spatula

🍶Storage

Store in an airtight container. Enjoy within 3-5 days. No need to refrigerate. Storing with a slice of bread helps to prevent dryness.

You may freeze Peanut Butter Chocolate Chip Bars after they bake and have cooled completely. Store in freezer safe packaging for up to 2 months. Thaw overnight in the fridge and enjoy!

💭Top tip

I generally bake these for 20-22 minutes. Keep in mind that the longer cookie bars bake, the more cake-like they will be. The less they bake, the more they will resemble a blondie (but of course, bake them long enough so that they're not too ooey gooey and are safe to eat). As a general rule of thumb, you want the tops and edges to be golden brown and buttery crisp, with a soft and chewy, dense center.

Always use a metal, non-stick pan for cookie bar recipes.

🥄Related

Looking for other recipes like this? Try these:

  • mini egg cookie bars
    Cadbury Mini Egg Cookie Bars
  • peanut butter butterscotch blondies
    The Best Fudgy Peanut Butter Butterscotch Blondies
  • chocolate peanut butter pie
    Easy No-Bake Chocolate Peanut Butter Pie
  • peanut butter footballs ready for game day
    Peanut Butter Footballs

🍴Pairing

These are my favorite sandwiches to serve with Peanut Butter Chocolate Chip Bars:

  • chicken salad wrap on plate
    Chicken Salad Wraps
  • turkey and cheese pinwheels
    Turkey and Cheese Pinwheels
  • cheesy pepperoni pizza sliders
    Cheesy Pepperoni Pizza Sliders
  • ham and swiss cheese sliders on pan
    Ham and Swiss Cheese Sliders

📋Recipe with step-by-step instructions

peanut butter chocolate chip bars

Peanut Butter Chocolate Chip Bars

Kitchen Ready Betty
Peanut Butter Chocolate Chip Bars will melt in your mouth with their buttery crisp edges and soft and chewy center. Loaded with crunchy Reese's Pieces and gooey chocolate chips, each bite is peanut butter chocolate bliss.
5 from 1 vote
Print Recipe Pin Recipe
Prep Time 20 minutes mins
Cook Time 20 minutes mins
Total Time 40 minutes mins
Course Desserts
Cuisine American
Servings 24

Equipment

  • 13x9 nonstick metal pan (lined with parchment paper for easy removal)
  • large microwaveable mixing bowl
  • medium mixing bowl
  • measuring cups
  • measuring spoons
  • mixing spoon
  • whisk
  • scraping spatula

Ingredients
  

  • 2 sticks butter
  • 1 & ¼ cups brown sugar firmly packed
  • 2 large eggs at room temperature
  • 2 teaspoon pure vanilla extract
  • 2 cups all-purpose flour spoon and level for best results
  • 2 teaspoon baking powder
  • ½ teaspoon salt
  • 1 cup Reese's Pieces
  • 1 cup chocolate chips
Prevent your screen from going dark

Instructions
 

  • Preheat oven to 350℉.
  • Melt butter in a large microwaveable mixing bowl; allow to cool slightly.
  • Add the brown sugar; mix well.
  • Add the eggs, one at a time, followed by the vanilla extract. Mix.
  • In a separate medium bowl, mix the flour, baking powder and salt. Add this mixture to the large bowl; stir until just combined.
  • Stir in Reese's Pieces and chocolate chips until just combined.
  • Bake in a preheated 350 degree oven for 20-22 minutes. Let cool 10 minutes before cutting into squares and serving.

Notes

When combining the dry and wet ingredients, stir until JUST COMBINED (it's okay if the batter is a little lumpy). If you over stir, it will become too cake-like.
I generally bake these for 20-22 minutes. Keep in mind that the longer the bars bake, the more cake-like they will be. The less they bake, the more they will resemble a blondie (but of course, bake them long enough so that they're not too ooey gooey and are safe to eat). As a general rule of thumb, you want the tops and edges to be golden brown and buttery crisp, with a soft and chewy, dense interior.
You may choose to gently push additional Reese's pieces and chocolate chips into the top of the batter before baking for added aesthetic appeal.
Keyword chocolate chip peanut butter bars, chocolate peanut butter bars, cookie bars, peanut butter chcolate chip cookie bars, peanut butter chocolate chip, peanut butter chocolate chip bar, peanut butter chocolate chip bars, Reese's pieces
Tried this recipe?Let us know how it was!

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Comments

  1. Barbara says

    September 29, 2025 at 2:44 pm

    5 stars
    These sound too hard to resist.

    Reply
    • Kitchen Ready Betty says

      September 30, 2025 at 10:08 am

      Right? Chocolate and peanut butter is my weakness!

      Reply

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I'm on a mission to help you serve simple, fun, and healthy-ish meals that pass the ultimate test: the picky eaters in your house. Whether it’s a quick weeknight dinner or a special holiday treat, my recipes are all about big flavor with minimal fuss.

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