Peanut Butter S’more Bars

Name: Peanut Butter S'more Bars
Prep time: 5 min
Cook time: 35 min
Total time: 40 min
Ingredients: 1 cup butter (at room temperature); 1/2 cup brown sugar; 1 cup sugar; 3 large eggs; 2 tsp vanilla extract; 2 2/3 cups flour; 1/3 cup graham cracker crumbs; 2 tsp baking powder; 1/2 tsp salt; 2 Hershey milk chocolate bars; 12 Reese's Peanut Butter Cups; 1 1/2 cups marshmallow fluff

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By: Britni Vigil

7/13/2020Updated: 6/10/2022

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These peanut butter s’more bars will immediately have you asking for some more! Traditional s’more flavors of chocolate and marshmallow are combined with peanut cups for one amazing bar.

Close up shot of smore bars on a brown paper napkin

Not Your Average S’mores

Okay so we’ve all tried s’mores before. And if you haven’t, stop reading and go make yourself a s’more. I mean maybe even go all out and try setting up an entire DIY s’mores bar.

For the rest of us, there is just something magical about the three traditional flavors of a s’more – graham cracker, chocolate, and marshmallow.

These peanut butter s’more bars take those flavors up a notch with a graham cracker cookie crust, chocolate, marshmallow, and peanut butter cups.

Yep, I said peanut butter cups. S’mores with peanut butter cups are a whole different experience (an amazing one!) than regular s’mores and these s’mores bars are a play on that.

They may be even better than these cookie s’mores.

And they’re so easy to make! Mix, top, bake. Eat. Then try your best not to eat the entire pan.

If you’re looking for something with peanut butter and chocolate but not marshmallow, try out these yummy peanut butter brownies, they’re also delicious!

Ingredients

Ingredient Notes

This is more about the method of cooking than the measurements!

Marshmallow fluff – you can also use marshmallow creme but don’t try to use melted marshmallow, it won’t work the same
Graham cracker crumbs – either the store-bought graham cracker crumbs or graham crackers turned into crumbs in a food processor work great
Chocolate – we always use Hershey Chocolate Bars and Reese’s Peanut Butter cups because they melt well and are predictable. You can try other chocolate brands but no guarantee they’ll melt the same.

Instructions

One of the things we love most about this recipe is how easy it is. It make look impressive and delicious but it doesn’t take too long to make!

1 – Make the dough

Start by getting your oven and dish ready. Preheat to 350 degrees and add piece of foil or parchment paper to a 9×13 baking dish – make it long enough so it hangs over the ends.

Then it’s time to make the graham cracker cookie dough.

Similar to our pecan pie bars, you’re going to cream together the butter and sugar. Then add in your eggs and vanilla to finish off the wet ingredients.

In another bowl, you’ll mix together the remaining dry ingredients – flour, graham cracker crumbs, baking powder, and salt.

Then you add the dry ingredients to the wet and mix until combined. Dough complete.

Smore bar dough in a silver pot on a blue background

2 – Make the bars

Now it’s time to turn that graham cracker cookie dough into peanut butter s’more bars!

Divide the dough in half and press half the dough down into the baking dish to create the bottom of the bars.

Then top your crust with the peanut butter cups and fill in the spaces with pieces of the chocolate bar.

Peanut butter cup and Hershey chocolate pieces on top of a smore bar crust in a baking dish

Once your chocolate is all in, spread the marshmallow fluff over the chocolate to create the ooey gooey part of the s’mores bars.

Marshmallow fluff in a baking dish with tin foil

Finish the bars off by adding the second half the graham cracker cookie dough on top of the marshmallow coating. This will finish the sandwich, kind of like the second graham cracker on top of a traditional s’more.

Smores bar dough in a baking dish with aluminum foiil

3 – Bake and enjoy

Now all that’s left is tossing those babies into the oven for 30-35 minutes and letting them cook until lightly browned.

Then enjoy by the pan full. Or at least that’s what I do!

Three stacked smore bars on a brown napkin

Expert Tips

Line the baking dish with parchment paper, with a bit of extra on the ends, so that when your peanut butter s’more bars are done, you can simply pull the parchment paper out and cut out of the dish.

Flatten the remaining dough before you put it on top then just patch it together to cover most of the marshmallow. It doesn’t need to be totally covered.

Cool completely before cutting into the bars. I know you’ll want to eat them right away but they need to cool or you’ll burn your little tongue on the marshmallow and they may fall apart.

Two smore bars stacked on a brown napkin with peanut butter cups and chocolate bars around

Recipe FAQs

Can you freeze s’more bars?

I don’t recommend freezing these because the marshmallow fluff can change texture after freezing and thawing. You can freeze the graham cracker cookie dough if you want to make them even easier in the future!

Can you use other chocolate?

Yes, but they may not end up exactly the same. But we’ve found it fun to experiment with different things that still melt well like Rolos.

How long will these s’more bars last?

These bars can be kept in an airtight container for up to a week, but they likely won’t last that long!

Peanut butter smore bar on a brown napkin with a white wood background

Peanut Butter S’more Bars

Not Your Average S’mores

Ingredients

Ingredient Notes