S'mores Brown Butter Blondies

Name: Brown Butter S'mores Blondies Recipe
Prep time: 15 min
Cook time: 25 min
Total time: 40 min
Ingredients: 2 sticks butter (browned); 100 g cane sugar (1/2 cup); 100 g brown sugar (1/2 cup); 2 large eggs; 1 tbsp vanilla extract; 330 g all purpose flour (2 1/2 cups); 2 tsp baking soda; 1 tsp cinnamon; 4 whole graham crackers (blended into crumbs); 1 whol graham cracker (chopped); 1/2 large chocolate bar (roughly chopped); 1/2 cup mini marshmallows

Modified: Jul 2, 2025 by Morgan Peaceman · This post may contain affiliate links · 2 Comments

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What happens when you take the nostalgic flavors of s'mores and give them a twist? Deliciousness. These S'mores Brown Butter Blondies combine everything we love about campfire treats-melty chocolate, gooey marshmallows, and graham cracker crunch-packed into one ridiculously chewy, golden-brown bar.

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Recipe at a Glance:
Expert Tips for Perfect Blondies
Important Ingredients
Step-By-Step Process Photos
Can I turn these blondies into cookies? How about a cookie skillet?
Storage and Freezer Information
Hungry for more?
Brown Butter S'mores Blondies Recipe

Recipe at a Glance:

Cook Level: Quick, beginner-friendly, and nearly foolproof. If you can stir and pour, you can master these blondies.
Taste/Flavor: Buttery and nutty from the brown butter, gooey and chocolatey from the melted chunks, with a sweet marshmallow finish and a subtle crunch from graham crackers.
Cooking Time: From browning the butter to slicing into these beauties, the whole process takes about 40 minutes (including cooling time-if you can wait that long).
Best Served With: A tall glass of milk, a scoop of vanilla ice cream, or even a drizzle of warm caramel sauce. If you're feeling extra indulgent, sandwich two blondie squares with a marshmallow in the middle for the ultimate s'mores-inspired treat.

Expert Tips for Perfect Blondies

Layering Ingredients: Fold in graham cracker crumbs, chopped chocolate, and mini marshmallows gently to maintain their integrity and ensure even distribution.
Browning the Butter: Melt unsalted butter over medium heat, stirring constantly until it turns amber and emits a nutty aroma. This process enhances the depth of flavor in your blondies.
Mixing the Batter: After browning the butter, let it cool slightly before combining it with the sugars and eggs to prevent curdling.

ingredients for brown butter smores blondies

Important Ingredients

Butter - We actually use brown butter to make these blondies, because browning butter gives any dessert an elevated, nuttier, creamier taste.
Sugar - We combine brown sugar with cane sugar to give the blondies extra an extra chewy texture.
Eggs - Eggs are essential in baked goods.
Vanilla Extract - Vanilla extract is added for extra flavor.
All Purpose Flour - I like using a classic all purpose flour for baking. It's versatile and very reliable.
Baking Soda - Baking soda gives us the rise and texture that we want for blondies.
Cinnamon - I like to add cinnamon to give the blondies a little warmth in flavor.
Graham Crackers - We use both chopped graham crackers and graham cracker crumbs.
Chocolate - Just a half of a chocolate bar chopped in thick pieces is perfect.
Mini Marshmallows - This wouldn't be a s'mores recipe if we didn't have marshmallows.

Be sure to check out the recipe card at the end of this post for more information about quantities, measurements, and specific cooking instructions.

Step-By-Step Process Photos

Step 1: Add butter to a light-bottomed medium pan and turn flame on to medium heat. It will begin to sputter and foam. This is a good thing! Continue to stir the butter and keep on a medium heat, ensuring the solids do not burn at the bottom. The aromas from the browned butter should be intense with nutty and buttery notes. Let the butter brown; keep an eye on the butter for 5-7 minutes and turn off the heat. Scrape the browned bits and the browned butter into a bowl and set in the fridge for approximately 1 hour.

graham cracker crumbs in a food processor

Step 2: Place 4 graham crackers into a food processor and blend until the crackers become very fine.

Step 3: Cream butter and sugars together with a hand mixer.

eggs and vanilla added to creamed brown butter and sugar

Step 4: To the creamed butter and sugar, crack in the eggs and vanilla extract mix.

dry ingredients added to wet ingredients with a sprinkle of cinnamon

Step 5: To the wet ingredients, pour in the flour and baking soda and mix until the batter comes together.

Step 6: Grease a 9x9 square pan and line with parchment paper. Pour the batter into the pan, then spread the batter evenly across the pan.

blondie batter with graham crackers and chopped chocolate

Step 7: Top the blondie batter with chopped graham crackers and chocolate.

Step 8: Last, add a generous helping of mini marshmallows, then bake for 24-25 minutes.

Yes! You can make these into cookies. Simple follow the directions to making the blondies, but let the batter sit and chill for an hour before baking.

Then, roll each cookie dough ball into graham crackers, top with a chunk of chocolate and marshmallows, then bake at 350º for 11 minutes.

You can use a cast iron skillet or pan to bake this into a large sharable dessert skillet too!

brown butter s'mores blondie on a cooling rack

Storage and Freezer Information

To Store: Add any leftover blondies to an airtight container and sit on the counter for up to 3 to 4 days.

To Freeze: Place any s'mores blondies in a resealable plastic bag, labeling the date that they were baked. When you'd like to bake them or when you'd like to thaw them and eat them, place some on the counter or in the refrigerator to thaw.