Peanut Butter Chocolate Chip Cookie Bars are my favorite way to get that soft and chewy cookie texture without fussing with scooping and batches. They bake in one pan, slice cleanly, and taste like a classic peanut butter cookie with chocolate in every bite.
I like this version because the centers stay thick and tender, while the edges get just a little more set. The peanut butter comes through clearly, and the semisweet chocolate keeps it feeling like a real dessert bar, not a snack bar situation.
These are especially good for cookie trays, potlucks, and any time I need an easy dessert that travels well. For me, they’re also a solid weekend bake when I want something familiar and dependable.
Why You’ll Love This Recipe
One-pan baking: No cookie sheets, no rotating trays, no batch timing. You spread the dough once and you’re done.
Soft and chewy: The bars stay tender in the middle with that slightly chewy bite I want from peanut butter cookies.
Classic flavor combo: Peanut butter and chocolate just work, and these taste like the best parts of both.
Easy to slice and serve: They cut into neat squares, which makes them great for sharing and packing up.
Simple swaps: You can mix in chopped peanuts, or trade some chocolate chips for peanut butter chips if you want a stronger PB vibe.
Ingredients You’ll Need
Wet Ingredients
- Unsalted butter: I like it softened so it creams easily and the batter spreads evenly in the pan. If you only have salted butter, just go lighter on the added salt.
- Creamy peanut butter: Regular creamy peanut butter works best here (the classic jar kind). Natural peanut butter can work, but it can make the texture a little more crumbly or oily.
- Light brown sugar: This is where a lot of the chewiness comes from. Dark brown sugar works too if you want a slightly deeper flavor.
- Granulated sugar: I still use some white sugar so the bars don’t turn out too heavy. It also helps the edges set a bit.
- Eggs: Use large eggs, and make sure they’re mixed in well so the batter is smooth.
- Vanilla extract: Don’t skip it. It makes the whole pan taste more like a real cookie bar instead of just sweet peanut butter.
Dry Ingredients
- All-purpose flour: I use regular all-purpose flour here. Spoon it into your measuring cup so you don’t pack in too much and dry out the bars.
- Baking soda: This helps the bars puff slightly and keeps them from baking up dense.
- Salt: Even with sweet bars, salt matters. It keeps the peanut butter and chocolate from tasting flat.
Mix Ins
- Semi-sweet chocolate chips: Semisweet is my go-to here. Milk chocolate is fine if that’s what you have, but it will be sweeter.
- Chopped peanuts (optional): I like these for a little crunch, especially if you’re serving the bars at a party. Totally optional if you want a softer bar.
Recipe Instructions
- Preheat the oven: Heat the oven to 350°F. Line a 9 x 13 inch baking pan with parchment paper and lightly grease it.
- Cream the butter and sugar: Beat the softened butter with the brown sugar and granulated sugar until fluffy.
- Add the peanut butter: Beat in the peanut butter until smooth and fully mixed.
- Add the eggs and vanilla: Mix in the eggs and vanilla until combined, scraping down the bowl if needed.
- Mix the dry ingredients: In a separate bowl, whisk the flour, baking soda, and salt together.
- Add the dry ingredients: Mix the dry ingredients into the wet ingredients just until you don’t see dry streaks of flour.
- Fold in the chocolate chips: Stir in the chocolate chips (and chopped peanuts, if using) just until evenly mixed.
- Spread the batter: Spread the batter evenly in the prepared pan. Smooth the top so it bakes evenly.
- Bake: Bake for 20 to 25 minutes, until the edges are set and the center is still slightly soft.
- Let cool: Cool completely in the pan, then lift out using the parchment and slice into bars.
Some of my tips!
This is the part that really makes a difference. If you only read one section, make it this one because this is where I share the little trick that helps the recipe turn out so well.
Recipe Tips & Tricks
Use parchment paper. It makes it much easier to lift the bars out in one piece and cut clean squares. I still lightly grease the pan so the corners don’t stick.
Don’t overmix once the flour goes in. Mix just until the flour disappears. Overmixing can make the bars a little tougher.
Pull them when the center looks slightly underdone. The edges should look set, but the middle should still look soft. They finish as they cool and stay chewier that way.
Let them cool completely before slicing. Warm bars will feel too soft and can smear when you cut them. If you want neat squares, give them time.
Try a chip swap if you like. Trading some of the chocolate chips for peanut butter chips is really good here. I usually swap about a quarter of the chips so it doesn’t get too sweet.
Make some touches!
There are plenty of easy ways to serve this depending on the occasion. Keep it simple, or add a few small touches to make it feel a little more special.
Serving Suggestions
- Milk: A cold glass of milk is classic with these. I like it especially when the bars are on the chewier side.
- Coffee: These are really good with a cup of coffee in the afternoon. Dark roast or a simple latte works well.
- Ice cream: Serve a bar with vanilla ice cream on the side if you want a more “dessert” dessert. A little chocolate sauce is nice too.
- Fruit: Fresh strawberries or raspberries are a good contrast on the plate. It keeps things from feeling too heavy.
Save it for later
This section covers how to store leftovers and what parts of the recipe you can prepare ahead of time.
Storage and Make Ahead
Store the bars airtight at room temperature for up to 4 days. I like using a container with a tight lid so they stay soft. If your kitchen is warm, keep them out of direct sunlight.
If you want to make them ahead, these are a good choice because the texture holds up well the next day. I usually bake them, cool completely, then slice and store.
For longer storage, you can freeze the bars for up to 2 months. Wrap individual squares or freeze them in layers with parchment between so they don’t stick together.
Thaw at room temperature for an hour or so, or overnight in the fridge. If you like them slightly warm, a quick microwave warm-up works.
A few quick answers
This section covers a few extra details that may help before you head to the recipe card.
Recipe FAQs
How do I know when cookie bars are done?
I look for set, lightly golden edges and a center that still looks a little soft. If the whole pan looks fully firm in the middle, they’ll usually cool up more cakey than chewy.
Can I use natural peanut butter?
You can, but the texture can change because natural peanut butter separates and has more oil. If you use it, stir it really well first, and expect the bars to be a bit more crumbly and less “cookie-like.”
Can I swap in peanut butter chips?
Yes. I like swapping about 1/2 cup of the chocolate chips for peanut butter chips so you still get that chocolate flavor, but with a stronger peanut butter note.
Why did my bars turn out dry?
The most common reasons are a little too much flour (packed measuring cup) or baking too long. Also make sure you’re mixing the flour in just until combined.
Can I add chopped peanuts?
Definitely. Stir in a handful for crunch, or sprinkle a few on top before baking if you want them more noticeable. Just keep the pieces fairly small so the bars still slice neatly.
You might also like
Before you go, take a look at a few other recipes below the recipe card. They use similar ingredients in a different way and are worth saving too.
MORE DINNER RECIPES TO TRY
Peanut Butter Chocolate Chip Cookie Bars
INGREDIENTS
Wet Ingredients
- 1 cup unsalted butter softened
- 1 cup creamy peanut butter
- 1.5 cups light brown sugar packed
- ½ cup granulated sugar
- 2 large eggs
- 2 tsp vanilla extract.
Dry Ingredients
- 2.5 cups all purpose flour
- 1 tsp baking soda
- ½ tsp salt.
Mix Ins
- 2 cups semi sweet chocolate chips
- chopped peanuts optional.
INSTRUCTIONS
Prep
- preheat oven to 350 F
- line a 9 x 13 inch baking pan with parchment paper and lightly grease.
Mix and Bake
- cream butter brown sugar and granulated sugar until fluffy
- beat in peanut butter until smooth
- mix in eggs and vanilla until combined
- whisk flour baking soda and salt in a separate bowl then mix into wet ingredients just until no dry streaks remain
- fold in chocolate chips
- spread batter evenly in pan
- bake until edges are set and center is slightly soft 20 to 25 minutes
- cool completely in pan then lift out and slice into bars.
