You know I love baking and sometimes I just get a wild idea so the other day I decided to make my favorite s’mores cookie bars because I wanted something gooey and sweet and also easy enough to whip up after a long day, and honestly, the first batch came out a little lopsided but still amazing so I grabbed my spatula and dove right in.

I remember that time I tried the s’mores cookie bars again because my grandkids were over and they kept asking for chocolate and marshmallows and I thought why not just combine it all so I baked them and as usual the marshmallows oozed out in funny shapes but we all laughed and ate them straight from the pan while the chocolate was still melty and the graham crackers crunchy enough to make it all perfect.
Last week I was rushing to get dessert ready for a small family get-together and I made these s’mores cookie bars because I knew everyone would love them, and I almost forgot the brown sugar and then I realized quickly and added it in and the bars came out slightly sweeter than usual but everybody kept saying how good they wer,e and I was secretly proud.
I’ve tried these s’mores cookie bars with so many things and honestly there’s a bunch that taste amazing together like a scoop of vanilla ice cream on top or a dollop of peanut butter spread across each square and even dipping them in warm hot chocolate or enjoying them with fresh strawberries or Cinnamon Sugar Donut Muffins or a drizzle of caramel sauce or a cup of cold milk because it balances the sweetness and honestly each combo just makes the treat feel even more special and comforting.

Ingredients
- unsalted butter
- brown sugar
- white sugar
- eggs
- vanilla extract
- all-purpose flour
- baking soda
- salt
- graham crackers
- mini marshmallows
- milk chocolate bars
Ingredients notes
- unsalted butter: This is soft butter without added salt. It makes the bars rich and chewy.
- brown sugar: This sugar is soft and sticky, giving the bars a deeper sweet taste.
- white sugar: This sugar is sweet and helps the cookie part stay fluffy.
- eggs: Eggs hold everything together like glue.
- vanilla extract: A tiny splash makes the bars smell amazing.
- all-purpose flour: This is the main dry ingredient that makes the cookie strong.
- baking soda: This helps the dough rise a little so it’s not flat.
- salt: Just a pinch balances the sweetness.
- graham crackers: Crunchy and sweet, they are the base flavor of s’mores.
- mini marshmallows: These melt and become gooey and stretchy in the bars.
- milk chocolate bars: Chocolate makes the bars rich, sweet, and classic s’mores.

How to make S’mores Cookie Bars ?
Step 1: Get the oven ready
Turn on the oven to 350°F (175°C). While it warms up, line a baking pan with parchment paper. This helps the bars come out easily later without sticking.
Step 2: Mix the butter and sugars
Put the unsalted butter, brown sugar, and white sugar in a big bowl. Use a mixer or a spoon to stir them until the mix looks light and fluffy.
Step 3: Add eggs and vanilla
Crack in the eggs one at a time. Pour in the vanilla extract. Mix until everything looks smooth and creamy.
Step 4: Add the dry ingredients
In another bowl, stir together all-purpose flour, baking soda, and salt. Slowly pour this dry mix into the wet mix. Stir until you have a thick cookie dough.
Step 5: Add graham crackers and chocolate
Break the graham crackers into small chunks and add them in. Chop the milk chocolate bars into squares and mix them in too.
Step 6: Spread half the dough
Put half of the cookie dough into the baking pan. Spread it out evenly so it covers the bottom.
Step 7: Add marshmallows
Sprinkle the mini marshmallows over the dough. Try to spread them evenly so every bite gets some gooey goodness.
Step 8: Add the rest of the dough
Take the last half of the dough and spread it gently over the marshmallows. You don’t have to cover them perfectly. A few marshmallows poking out will look nice.
Step 9: Bake the bars
Put the pan in the oven and bake for about 25–30 minutes. The top should be golden brown.
Step 10: Cool and cut
Take the pan out and let it cool down. When it’s not too hot, lift the bars out with the parchment paper and cut them into squares.
Storage options
These bars can be stored in an airtight box on the counter for about 3 days. If you want them to last longer, put them in the fridge for up to a week. For even longer, you can freeze them. Wrap each bar in plastic and then place in a freezer bag. When you want one, just let it thaw for a few minutes or warm it up in the microwave for a gooey treat.
variations
One way to change this recipe is by using dark chocolate instead of milk chocolate, which makes the bars taste a little less sweet. Another fun twist is adding peanut butter chips into the dough for a nutty flavor. You could also sprinkle in some M&Ms for a colorful and crunchy bite. Another idea is swapping graham crackers for digestive biscuits if you don’t have the classic ones. For a holiday touch, you can mix in peppermint pieces that make the bars taste fresh and festive.
Kitchen equipment needed
- Mixing bowls
- Measuring cups and spoons
- Electric mixer or wooden spoon
- Baking pan (9×13 inch works best)
- Parchment paper
- Spatula
- Knife for cutting
Faq
What is this S’mores Cookie Bars recipe made of?
It is made of cookie dough, graham crackers, marshmallows, and chocolate, all baked into one pan.
What does these S’mores Cookie Bars taste like?
It tastes sweet, chocolatey, gooey from marshmallows, and a little crunchy from graham crackers.
Can I use big marshmallows?
Yes, just cut them into smaller pieces so they spread evenly.
Can I make these without chocolate bars?
Yes, you can use chocolate chips instead if that’s what you have.
Do I need parchment paper?
It’s best to use it because it makes lifting the bars out easier, but you can also just butter the pan well.
Can I make this ahead of time?
Yes, you can bake it a day before and keep it in a box. It will still taste fresh.
How do I know when it’s done?
The top will look golden brown and a toothpick poked in the middle will come out mostly clean.
Can I eat it warm?
Yes, it’s delicious warm when the marshmallows are gooey and the chocolate is melty.
S’mores Cookie Bars
Course: DessertCuisine: AmericanDifficulty: Easy16
servings15
minutes30
minutes280
kcal45
minutesThese s’mores cookie bars are soft, gooey, and full of chocolate, marshmallows, and graham cracker flavor, all baked together in one easy treat.
Ingredients
unsalted butter
brown sugar
white sugar
eggs
vanilla extract
all-purpose flour
baking soda
salt
graham crackers
mini marshmallows
milk chocolate bars
Directions
- Turn on the oven to 350°F (175°C). While it warms up, line a baking pan with parchment paper. This helps the bars come out easily later without sticking.
- Put the unsalted butter, brown sugar, and white sugar in a big bowl. Use a mixer or a spoon to stir them until the mix looks light and fluffy.
- Crack in the eggs one at a time. Pour in the vanilla extract. Mix until everything looks smooth and creamy.
- In another bowl, stir together all-purpose flour, baking soda, and salt. Slowly pour this dry mix into the wet mix. Stir until you have a thick cookie dough.
- Break the graham crackers into small chunks and add them in. Chop the milk chocolate bars into squares and mix them in too.
- Put half of the cookie dough into the baking pan. Spread it out evenly so it covers the bottom.
- Sprinkle the mini marshmallows over the dough. Try to spread them evenly so every bite gets some gooey goodness.
- Take the last half of the dough and spread it gently over the marshmallows. You don’t have to cover them perfectly. A few marshmallows poking out will look nice.
- Put the pan in the oven and bake for about 25–30 minutes. The top should be golden brown.
- Take the pan out and let it cool down. When it’s not too hot, lift the bars out with the parchment paper and cut them into squares.
- These bars can be stored in an airtight box on the counter for about 3 days. If you want them to last longer, put them in the fridge for up to a week. For even longer, you can freeze them. Wrap each bar in plastic and then place in a freezer bag. When you want one, just let it thaw for a few minutes or warm it up in the microwave for a gooey treat.
- One way to change this recipe is by using dark chocolate instead of milk chocolate, which makes the bars taste a little less sweet. Another fun twist is adding peanut butter chips into the dough for a nutty flavor. You could also sprinkle in some M&Ms for a colorful and crunchy bite. Another idea is swapping graham crackers for digestive biscuits if you don’t have the classic ones. For a holiday touch, you can mix in peppermint pieces that make the bars taste fresh and festive.
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