S'mores Tart
S'mores Tart is a medium American recipe that serves 8. 475 calories per serving. Recipe by Claire Saffitz x Dessert Person on YouTube.
Prep: 1 hr 11 min | Cook: 30 min | Total: 2 hrs 1 min
Cost: $10.80 total, $1.35 per serving
Ingredients
- 7 oz Graham crackers (finely crushed; about 13 sheets)
- 9 tbsp Unsalted butter (divided: 5 tbsp for crust, 4 tbsp for ganache)
- 0.75 cup Granulated sugar (2 tbsp for crust, 2/3 cup for marshmallow)
- 0.25 tsp Kosher salt (divided: pinch for ganache, pinch for marshmallow, 1/4 tsp for crust)
- 1 Large egg yolk (room temperature)
- 1.25 cup Heavy cream (3/4 cup for ganache, 1/2 cup for whipping)
- 6 oz Semi‑sweet chocolate (chopped into small pieces)
- 2 tbsp Light corn syrup
- 2.5 tsp Powdered unflavored gelatin
- 0.25 cup Cold water (for gelatin hydration)
- 3 Large egg whites (room temperature)
- 1.5 tsp Vanilla extract
- 0.5 tsp Apple cider vinegar
Instructions
Preheat oven
Set oven to 350°F and let it fully preheat.
Time: PT5M
Temperature: 350°F
Crush graham crackers
Place 7 oz of graham crackers in a zip‑top bag and roll with a rolling pin until fine. Shake the bag to bring larger pieces to the top, then re‑roll for uniform crumbs.
Time: PT5M
Melt butter for crust
Melt 5 tbsp unsalted butter in a saucepan over medium heat until fully liquid.
Time: PT2M
Combine crust ingredients
In a large bowl combine crushed crackers, melted butter, 2 tbsp sugar, 1/4 tsp kosher salt, and 1 large egg yolk. Mix until the mixture resembles wet sand.
Time: PT5M
Press crust into pan
Evenly distribute the crumb mixture into the tart pan, pressing up the sides with a straight‑sided measuring cup and smoothing the bottom with your palm.
Time: PT5M
Bake crust
Place the tart pan on a sheet tray and bake for 13‑18 minutes, until the edges are fragrant and lightly darker.
Time: PT15M
Temperature: 350°F
Cool crust
Remove the crust from the oven and let it cool on a rack; it must be room temperature before filling.
Time: PT5M
Warm cream for ganache
In a saucepan heat 3/4 cup heavy cream over medium until just simmering (tiny bubbles at the edges).
Time: PT3M
Make chocolate ganache
Remove the pan from heat, add 6 oz chopped semi‑sweet chocolate, a pinch of salt, and 4 tbsp butter. Stir until the chocolate is fully melted and the mixture is glossy.
Time: PT5M
Let ganache rest
Allow the ganache to sit for about 5 minutes so it thickens slightly.
Time: PT5M
Whip remaining cream
Using the hand mixer, whip the remaining 1/2 cup heavy cream to soft peaks.
Time: PT2M
Whip ganache lightly
Briefly whisk the ganache with the hand mixer until it looks like thick chocolate pudding.
Time: PT2M
Fold whipped cream into ganache
Gently fold the whipped cream into the ganache until fully incorporated and smooth.
Time: PT1M
Fill tart with ganache
Spread the chocolate‑cream filling evenly over the cooled crust, smoothing to the edge.
Time: PT2M
Set filling
Let the tart sit at room temperature for about 15 minutes so the ganache firms.
Time: PT15M
Hydrate gelatin
Sprinkle 2 ½ tsp powdered gelatin over 1/4 cup cold water in a small bowl. Let sit 10 minutes without stirring.
Time: PT10M
Prepare double boiler
Bring a saucepan of water to a gentle simmer (no rolling boil). Place a heat‑proof bowl over the pan, ensuring the bottom does not touch the water.
Time: PT2M
Melt gelatin
Add the hydrated gelatin to the bowl and stir until completely liquid with no visible granules.
Time: PT2M
Add sweeteners and flavor
Stir in 2 tbsp light corn syrup, a pinch of salt, 2/3 cup granulated sugar, and 1/2 tsp apple cider vinegar. Mix until smooth.
Time: PT3M
Cook egg‑white mixture
Add 3 large egg whites to the bowl. Continue whisking over the simmering water until the mixture becomes opaque, thick, and the sugar is fully dissolved (about 5‑7 minutes).
Time: PT7M
Add vanilla
Remove the bowl from heat, let cool a few seconds, then stir in 1‑2 tsp vanilla extract.
Time: PT1M
Whip marshmallow topping
Using the hand mixer, beat the mixture on low then high until stiff peaks form (about 12 minutes).
Time: PT12M
Spread marshmallow topping
Spoon the marshmallow over the set ganache, smoothing to the edge of the crust.
Time: PT2M
Set marshmallow
Allow the marshmallow layer to set at room temperature for at least 30 minutes (or until the surface develops a slight sheen).
Time: PT30M
Torch the topping
Using a kitchen torch, lightly brown the marshmallow surface, moving the flame continuously to avoid burning.
Time: PT2M
Slice and serve
Release the tart from the pan, slice into 8 even pieces, wiping the knife between cuts for clean slices.
Time: PT5M
Nutrition Facts
- Calories
- 475
- Protein
- 5 g
- Carbohydrates
- 45 g
- Fat
- 30 g
- Fiber
- 2 g
Dietary info: Vegetarian, Contains gluten, Contains dairy, Contains gelatin
Allergens: Gluten, Dairy, Eggs, Gelatin
Ingredient Substitutions
- Instead of Graham crackers: Digestive biscuits, Ginger snaps (light)
- Instead of Unsalted butter: Margarine (use unsalted)
- Instead of Granulated sugar: Coconut sugar
- Instead of Kosher salt: Sea salt
- Instead of Heavy cream: Half‑and‑half (less rich)
- Instead of Semi‑sweet chocolate: Dark chocolate (70% cacao)
- Instead of Light corn syrup: Honey, Maple syrup
- Instead of Powdered unflavored gelatin: Agar‑agar (use 1/2 amount)
- Instead of Large egg whites: Pasteurized egg whites (carton)
- Instead of Vanilla extract: Vanilla bean paste
- Instead of Apple cider vinegar: Lemon juice
Equipment Needed
- 9‑inch fluted removable‑bottom tart pan
- Sheet tray
- Saucepan
- Rolling pin
- Hand mixer
- Mixing bowls (various sizes)
- Measuring cups and spoons
- Heat‑proof bowl for double boiler
- Spatula / rubber scraper
- Kitchen torch (optional)
- Cooling rack
- Sharp knife for slicing
Critical Steps — Do Not Skip
- Preheat oven
- Combine crust ingredients
- Press crust into pan
- Bake crust
- Make chocolate ganache
- Fill tart with ganache
- Hydrate gelatin
- Melt gelatin
- Cook egg‑white mixture
- Whip marshmallow topping
- Spread marshmallow topping
- Torch the topping
Chef Tips from the Video
- Use high‑quality semi‑sweet chocolate for a smoother ganache.
- For an extra graham‑cracker flavor, toast the crushed crumbs lightly in a dry skillet before mixing with butter.
- If you don’t have a torch, place the tart under a very hot broiler for 30‑45 seconds, watching closely.
- A light dusting of cocoa powder on the finished tart adds visual contrast and a hint of bitterness.
Troubleshooting
Ganache looks grainy or has fat beads.
Add 2 tbsp cool tap water and whisk vigorously until glossy; if still broken, gently re‑heat over a double boiler while stirring.
Marshmallow topping is too runny and won’t set.
Ensure gelatin was fully hydrated and melted; if needed, add an extra ½ tsp gelatin dissolved in a tablespoon of warm water.
Crust cracks when pressing or after baking.
Do not over‑process the crumbs; keep some texture for binding. Also, add the egg yolk and sugar as instructed to improve cohesion.
Storage
Refrigerator: Cover tightly with plastic wrap; keep for up to 3 days.
Freezer: Wrap the whole tart in foil and then a freezer bag; freeze up to 1 month. Thaw in refrigerator before serving.
Room temperature: Best served within 2 hours of torching; after that, keep refrigerated.
Make-Ahead Tips
- Bake the crust up to 2 days ahead; store in an airtight container.
- Ganache can be prepared a day in advance and kept refrigerated; bring to room temperature before spreading.
- Marshmallow topping can be made up to 1 hour before serving; it will set faster in a cooler room.
- The tart freezes well after the marshmallow has set; thaw overnight in the fridge.
Last updated: August 21, 2026






