If you’re looking to relive the magic of childhood treats with an irresistible twist, these Peanut Butter & Jelly Cookie Bars are here to answer your cravings! Imagine everything you love about a PB&J sandwich transformed into thick, chewy cookie bars, layered generously with sweet, glossy jelly, and finished with a peanut butter swirl that melts right into every bite. Whether you’re baking for a lunchbox surprise, potluck showstopper, or a quiet afternoon snack, this nostalgic dessert brings comfort, flavor, and fun together in a way that’s simply unforgettable.

Peanut Butter & Jelly Cookie Bars Recipe - Recipe Image

Ingredients You’ll Need

The beauty of Peanut Butter & Jelly Cookie Bars lies in their short, classic ingredient list—each item serving an important role in both taste and texture. You probably have most of these kitchen staples on hand already, and each one transforms these bars into a bakery-worthy treat you’ll want to make on repeat.

Unsalted butter: Keeps the cookie base rich and tender, while letting the peanut butter flavor shine through.
Creamy peanut butter: Provides that classic nutty taste and irresistibly moist crumb you expect from a PB&J dessert.
Brown sugar: Adds chewy depth and a subtle molasses flavor that pairs so well with peanut butter.
Granulated sugar: Balances the bar’s sweetness and helps the cookie layer bake up just right.
Large egg: Binds the dough and gives it structure, ensuring perfectly cut bars that hold together.
Vanilla extract: Adds warmth and dimension, making every bite more comforting and familiar.
All-purpose flour: Lends the necessary structure to support the layered goodness.
Baking powder: Gives the bars just enough lift to keep them light and soft.
Salt: Balances all the sweet and nutty notes, so each bite sings.
Strawberry or raspberry jam: These classic jelly flavors bring bright, fruity contrast—use your favorite for a personal touch!
Powdered sugar: Sweetens and lightens the peanut butter topping, making it perfectly drizzle-able.
Milk: Thins out the peanut butter topping for that beautiful, creamy swirl effect on top.

How to Make Peanut Butter & Jelly Cookie Bars

Step 1: Prepare Your Pan and Oven

Begin by preheating your oven to 350°F (175°C) so it’s ready when you are—a properly heated oven ensures that your bars bake evenly with a perfectly golden edge. Line an 8×8-inch baking pan with parchment paper, leaving a bit of overhang for easy lifting later. This simple step means absolutely no sticking, and your Peanut Butter & Jelly Cookie Bars will release like a dream!

Step 2: Make the Cookie Dough

In a large mixing bowl, cream together the softened butter, creamy peanut butter, brown sugar, and granulated sugar until the mixture is light and fluffy. This extra moment of mixing is key—it builds air into the dough for that soft, chewy texture. Beat in the egg and vanilla extract, making sure everything is well incorporated for a smooth, luscious base.

Step 3: Combine the Dry Ingredients

In a separate bowl, whisk together the flour, baking powder, and salt. By blending these dry ingredients separately, you guarantee an even distribution, which helps your bars rise evenly and taste fabulous from edge to center.

Step 4: Mix and Press the Dough

Gradually incorporate the dry ingredients into the wet mixture, stirring just until combined. You want a smooth, thick dough that’s easy to spread but not overworked. Press the dough evenly into your prepared pan, making sure to get right into the corners for picture-perfect bars.

Step 5: Bake the Cookie Layer

Slide the pan into your preheated oven and bake for 18 to 20 minutes, or until the top is lightly golden and the edges are set. The aroma will have you peeking into the oven every five minutes! Allow the base to cool slightly so the jelly won’t melt right through when you add it.

Step 6: Layer on the Jelly

Spread the strawberry or raspberry jam evenly across the top of that thick, chewy cookie layer. Don’t be shy—you want a generous, vibrant layer so every single bite of your Peanut Butter & Jelly Cookie Bars gets that fruity, nostalgic burst.

Step 7: Make and Swirl the Peanut Butter Topping

In a small bowl, mix the remaining creamy peanut butter with powdered sugar and a splash of milk until luxuriously smooth. Use a piping bag or even a spoon to drizzle it over the jelly in beautiful swirls. This creamy layer sets off the jewel-like jam and gives each bar an extra hit of peanut butter bliss.

Step 8: Set and Slice

Let your bars cool and set before slicing into squares. This little bit of patience pays off—your cuts will be neat, and every bar will boast perfect layers. Now, dig in and savor every bite!

How to Serve Peanut Butter & Jelly Cookie Bars

Garnishes

While these bars are absolutely charming on their own, a few thoughtful touches can elevate them even more. Try a sprinkle of sea salt flakes for salted peanut butter fans, a dusting of confectioners’ sugar for a bakery look, or scatter a few freeze-dried raspberries over the top for a playful burst of color and crunch.

Side Dishes

Pair your Peanut Butter & Jelly Cookie Bars with a cold glass of milk, creamy hot chocolate, or a steaming cup of coffee. If you’re setting out an after-school spread or packing picnics, fresh berries or sliced apples on the side add a refreshing, fruity note to balance the sweet bars.

Creative Ways to Present

Go beyond the classic square by slicing your bars into triangles, stacking them on festive platters, or even wrapping each piece in parchment for an adorable grab-and-go treat. For parties, place individual bars in colorful cupcake liners, or drizzle extra peanut butter topping for dramatic effect—presentation is half the fun!

Make Ahead and Storage

Storing Leftovers

Keep leftover Peanut Butter & Jelly Cookie Bars fresh by storing them in an airtight container at room temperature for up to three days. They’ll stay moist and chewy, just as comforting on day three as fresh from the oven!

Freezing

These bars freeze beautifully. After slicing, lay them on a baking sheet to freeze individually, then transfer to a zip-top bag or freezer-safe container. They can be frozen for up to two months—simply thaw at room temperature whenever a craving strikes.

Reheating

If you prefer your Peanut Butter & Jelly Cookie Bars slightly warm, pop one in the microwave for about 10-15 seconds. The jelly and peanut butter swirl will gently melt, making your bar gooier and ultra-comforting.

FAQs

Can I use crunchy peanut butter instead of creamy?

Absolutely! Crunchy peanut butter adds a subtle textural twist. Just know the final swirl topping will have little nutty bits, which some people absolutely love!

What kind of jelly works best in these bars?

Classic strawberry or raspberry jam gives the best sweet, tart contrast, but feel free to get creative—apricot, blackberry, or even grape jelly all work beautifully in Peanut Butter & Jelly Cookie Bars.

Can I double this recipe for a crowd?

Yes! Simply double all the ingredients and bake in a 9×13-inch pan, adjusting the baking time as needed. It’s perfect for parties or sharing with classmates and friends.

How do I keep the cookie bars from sticking to the pan?

Lining your pan with parchment paper is key. It creates a nonstick surface and makes lifting out the bars a breeze—no more prying at the edges!

Can I make these bars gluten-free?

Definitely—substitute a cup-for-cup gluten-free all-purpose flour blend, and you’ll still get delicious, chewy Peanut Butter & Jelly Cookie Bars everyone can enjoy.

Final Thoughts

Whether you’re baking with kids, making sweet snacks for friends, or simply treating yourself, these Peanut Butter & Jelly Cookie Bars are sure to bring smiles and fond memories to every table. Whip up a batch and let them work their cozy, nostalgic magic—you’ll be hooked from the very first bite!

Peanut Butter & Jelly Cookie Bars Recipe