Peanut Butter Cookie Bars

Category: Desserts That Transform Moments

Peanut butter-packed bars. Ready in 1 hour. Makes 36 pieces. Share or freeze easily.
A woman in a white chef's coat smiles for the camera.
Created By Mia Laurent
Updated on Wed, 07 May 2025 18:41:58 GMT
Peanut Butter Cookie Bars Pin
Peanut Butter Cookie Bars | chefmiarecipes.com

Mix basic ingredients to create mouthwatering gluten-free bars packed with triple peanut butter flavor. These crowd-pleasing treats blend smooth peanut butter, peanut butter chips, and mini Reese's pieces with wholesome oats, giving you a chewy, delightful dessert that's great for parties or stashing in your freezer for later.

I came up with these bars because I can't get enough peanut butter combos. When my family tried them the first time, their faces lit up with each bite, and I knew I'd stumbled onto something truly special.

Key Ingredients

  • Standard peanut butter: Stick with smooth, regular type
  • Good butter: Forms the tasty base
  • Reliable oats: Combo of regular and quick for best bite
  • Brown sugar: Gives that perfect chew
  • Real vanilla: Boosts the peanut butter taste
  • Tiny Reese's pieces: Add fun pops of color and bite

Baking Your Bars

Mix Your Base:
Beat together butter, peanut butter, and sugars until they're super fluffy. Don't rush this step – you want that airy texture.
Add Wet Stuff:
Mix in eggs and vanilla until everything's smooth and well-combined.
Blend Dry Parts:
Stir in both kinds of oats and baking soda, making sure everything's evenly mixed.
Finish It Off:
Carefully fold in your peanut butter chips and Reese's pieces. Press everything flat in your pan so it bakes evenly.
Triple Peanut Butter Monster Cookie Bars (No Flour) Pin
Triple Peanut Butter Monster Cookie Bars (No Flour) | chefmiarecipes.com

What makes these so good is how the different oat types work with all that peanut butter goodness. You'll get the perfect chewy bite loaded with rich nutty flavor.

Tasty Companions

Try them slightly warm with a glass of cold milk. They're also great on a dessert platter with other cookies. Kids love finding these in their lunch boxes or munching them after school.

Switch It Up

Throw in some chocolate chips if you want more sweetness. Switch out the candy pieces for something different. Make them festive with holiday-colored candies. Make a double batch when you've got lots of people coming over.

Keeping Them Fresh

They'll stay yummy in an airtight container for about four days on your counter. Pop them in the fridge and they'll last up to a week. Wrap pieces individually and freeze them for up to two months.

Triple Peanut Butter Monster Cookie Bars Recipe Pin
Triple Peanut Butter Monster Cookie Bars Recipe | chefmiarecipes.com

These triple peanut butter treats have become my go-to for parties and get-togethers. The mix of different peanut buttery elements makes them vanish fast, and people always ask for more. They're just right for any time you need to feed a bunch of folks or want to stock up on tasty snacks.

Common Recipe Questions

→ Which peanut butter works best?
Smooth and creamy, not the natural kind, works great.
→ When are they done baking?
Look for golden edges but a slightly soft center.
→ Freezing tips?
Wrap each bar and keep frozen for up to 3 months.
→ Why use two kinds of oats?
Combining them gives the perfect chewy consistency.
→ How to decorate them better?
Add more candies on top before baking for a fun look.

PB Cookie Bars

Cookie bars with Reese's Pieces, peanut butter chips, and crunchy oats. Easy to make and share.

Prep Time
15 minutes
Cooking Time
15 minutes
Total Duration
30 minutes
Created By: Mia Laurent

Recipe Category: Sweet Comfort

Skill Level: Beginner-Friendly

Recipe Cuisine: American

Recipe Yield: 36 Number of Servings (36 bars)

Dietary Categories: Vegetarian-Friendly, Gluten-Free Option

Ingredients You’ll Need

→ Base

01 1 cup white sugar
02 1 cup brown sugar, packed
03 1 tablespoon vanilla
04 3 whole eggs
05 1 1/2 cups smooth peanut butter
06 1/2 cup salted butter, room temp

→ Dry Ingredients

07 1 teaspoon baking soda
08 1 1/2 cups quick-cooking oats
09 3 cups rolled oats

→ Mix-ins

10 1 cup peanut butter chips
11 1 bag (9.9 oz) Reese's Pieces candy

Steps to Make It

Step 01

Set the oven to 350°F. Cover a large cookie sheet (12x18) with a sheet of parchment.

Step 02

Cream together the peanut butter, butter, and sugars for a couple of minutes. Toss in the eggs and vanilla, then blend again.

Step 03

Stir in both oat types and the baking soda. Fold in the Reese's and peanut butter morsels.

Step 04

Press mixture evenly into the pan and bake for 16-20 minutes until edges turn golden. Let it cool for 30-60 minutes before slicing.

Extra Information

  1. Stick to regular peanut butter, avoid the natural kind
  2. Don’t overbake—it’s fine if the middle seems a bit soft
  3. Wrap pieces individually before freezing; they keep great

Essential Tools

  • Large 12x18 baking sheet with sides
  • Non-stick parchment
  • Mixer (electric works best)
  • Pizza wheel for cutting

Allergen Details

Review every item for allergen risks. Reach out to a healthcare expert for any concerns.
  • Has peanuts
  • Has milk products
  • Has egg ingredients

Nutritional Details (Per Serving)

These figures are for general reference and shouldn’t replace expert medical guidance.
  • Caloric Content: 216
  • Fat Content: 11 grams
  • Carbohydrate Content: 26 grams
  • Protein Content: 5 grams