S'mores Cookie Bars are the fastest way to get that campfire flavor without leaving your kitchen. Imagine a buttery graham cookie base, pools of milk chocolate, and a puffy marshmallow top that crackles under your fork. They’re ready in 40 minutes, slice neatly into 16 squares, and disappear even faster. If you love my <a href="https://desserts.cafof.com/2026/04/ultra-thick-bakery-style-chocolate-chip.html">Ultra Thick Bakery Style Chocolate Chip Cookies</a>, these bars are your next weekend project.
★★★★½ 4.5 (106 reviews)
Why You'll Love S'mores Cookie Bars (Easy 40-Minute Recipe)
S'mores Cookie Bars pack melty chocolate, toasty marshmallow & graham crunch into one pan—no campfire needed. 40-minute homemade treat!
- One bowl, no mixer, beginner-friendly
- Uses pantry staples you already have
- Portable—great for lunchboxes or potlucks
- Tastes like summer camp but bakes year-round
Ingredients
Graham crackers: Honey Maid gives classic flavor; gluten-free grahams work tooChocolate chips: Milk chocolate keeps it traditional; swap semi-sweet for less sweetness
- Graham crackers: Honey Maid gives classic flavor; gluten-free grahams work too
- Chocolate chips: Milk chocolate keeps it traditional; swap semi-sweet for less sweetness
Full measurements are in the recipe card below.
Instructions
Preheat & prep: Heat oven to 350°F. Line an 8×8-inch pan with parchment leaving overhang for easy lift-out.
Mix base: Stir melted butter, brown sugar, egg, and vanilla until glossy. Fold in graham crumbs, flour, baking powder, and salt until a soft dough forms.
Layer & bake: Press dough evenly into pan. Scatter chocolate chips on top, then marshmallows. Bake 22–25 min until edges turn golden and marshmallows are puffed.
Expert Tips for S'mores Cookie Bars (Easy 40-Minute Recipe)
- Chill the pan 10 min before slicing for cleaner cuts
- Use kitchen shears snipped in cold water to trim sticky marshmallow edges
- Add ½ cup chopped toasted pecans for crunch
S'mores Cookie Bars (Easy 40-Minute Recipe)
S'mores Cookie Bars pack melty chocolate, toasty marshmallow & graham crunch into one pan—no campfire needed. 40-minute homemade treat!
★★★★½ 4.5 (106 reviews)
Ingredients
Main Ingredients
- 1 ½ cups graham cracker crumbs (about 10 full sheets)
- ½ cup unsalted butter, melted
- ¼ cup brown sugar
- 1 large egg
- 1 tsp vanilla extract
- 1 cup all-purpose flour
- ½ tsp baking powder
- ¼ tsp salt
- 1 cup mini marshmallows
- 1 cup milk chocolate chips
Optional Toppings
- Extra marshmallows for broiling
- Crushed graham crackers for dusting
Instructions
How to Make S'mores Cookie Bars
- Preheat & prep: Heat oven to 350°F. Line an 8×8-inch pan with parchment leaving overhang for easy lift-out.
- Mix base: Stir melted butter, brown sugar, egg, and vanilla until glossy. Fold in graham crumbs, flour, baking powder, and salt until a soft dough forms.
- Layer & bake: Press dough evenly into pan. Scatter chocolate chips on top, then marshmallows. Bake 22–25 min until edges turn golden and marshmallows are puffed.
- Broil (optional): Switch oven to broil 30–45 sec to toast marshmallows. Cool 30 min in pan, then lift out and cut into 16 squares.
Nutrition
Calories: 185 kcal | Protein: 2 g
Storage
- Fridge: up to 3 days
- Freezer: not recommended
- Reheat: best fresh
FAQs
Can I make S'mores Cookie Bars ahead of time?
Yes—bake, cool, and store covered at room temp up to 3 days. Warm 5 min in 300°F oven to refresh.
What’s the best substitute for graham crackers?
Crushed digestive biscuits or Ritz crackers plus 1 tbsp honey work great.
How do I store leftovers?
Room temp in a sealed container; avoid fridge which hardens marshmallows.
Why did my bars turn out dry?
Over-baking is the usual culprit; pull when edges are golden and center still jiggles slightly.