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Toasted S'mores Graham Cracker Bundt Cake: a graham cracker cake filled with chocolate chip and swathed in toasted marsmallow fluff does a pretty dark good job of emulating your favorite summer treat!

S'mores Graham Cracker Bundt Cake

I am not sure if the hot sugar syrup kills all germs in the egg whites or not, so use raw egg whites at your own risk in the glaze (clearly I take that risk).

Course Dessert
Cuisine Cakes
Author TheSpicedLife

Ingredients

For the cake:

  • 1 cup (124 g, about 8 crackers) finely ground graham crackers
  • 3 cups (376 g) AP flour
  • 2 t baking powder
  • 1/2 t salt
  • 1 cup plus 6 T unsalted butter, room temperature
  • 2 T avocado oil
  • 1 cup sugar
  • 1/2 cup brown sugar
  • 6 large eggs
  • 1 t vanilla bean paste
  • 3/4 cup heavy cream
  • 3 cups (16.5 oz) miniature chocolate chips 1 1/2 11-oz bags

For the marshmallow glaze:

  • 1 cup sugar
  • 1/4 t cream of tartar
  • 1/3 cup water
  • pinch of kosher salt
  • 2 large egg whites
  • 1 t vanilla extract
  • 1 T heavy whipping cream

Instructions

First make the cake:

  1. Preheat the oven to 325 F. I used a 10 cup bundt pan, but I bet this recipe could work ok in a 12 cup pan as well; either way, grease and flour your bundt pan (I use the baking spray with flour). Set aside.
  2. Process your graham crackers until finely ground.
  3. Whisk the graham cracker crumbs, flour, baking powder and salt together. Set aside.
  4. Place the butter and oil in the mixer. Beat until creamy. 
  5. Scrape the sides and bottom of the bowl, and add half of the sugar. Beat on medium speed, adding the rest of the sugar gradually. Scrape the sides and bottom of bowl again, and then repeat with the brown sugar.
  6. Beat on medium-high speed until fluffy, about 3 minutes.
  7. Scrape the sides and bottom of the bowl, and then add the eggs, one at a time, beating well after each one. Scrape the bowl as needed.
  8. Beat in the vanilla bean paste.
  9. Toss the chocolate chips with 1-2 T of the flour mixture.
  10. On the slowest speed, add the remaining flour mixture and cream in 4 and 3 additions, respectively, alternating between the 2 and beginning and ending with the flour mixture.
  11. Mix in the chocolate chips, gently.
  12. Scrape the batter into the prepared pan and smooth the top so that it is even (this is a thick batter).
  13. Bake for around 75 minutes; as noted above, when I inserted a cake tester it came out clean AND the cake was pulling away from the sides BUT the cake was still wobbly when gently rocked. Do not remove the cake until it stops wobbling. If you are concerned about the cake getting too dark, place a piece of foil over the top of the cake pan loosely.
  14. Let the cake cool for 15 minutes in the pan, before turning out onto a piece of parchment paper on a cooling rack.
  15. Let the cake cool completely. Remove the parchment paper under the cake.

Make the glaze when the cake has cooled completely:

  1. When you are ready to glaze the cake, turn on the broiler (on high). It is imperative the broiler be very hot, so that the marshmallow toasts quickly without drying out the cake.
  2. Place the sugar, cream of tartar, water and kosher salt into a heavy saucepan (2 quarts was the perfect size for me). Set aside.
  3. Beat the egg whites until they are fluffy but do NOT hold a peak.
  4. Place the saucepan with the sugar on medium high heat. Stir until it is dissolved, and then stop stirring and attach a candy thermometer to the pan. 
  5. When the temperature reaches 240 F, turn the mixer speed on to high, and slowly drizzle the sugar syrup into the side of the bowl of the beating egg whites.

  6. It will thicken and become glossy, turning into marshmallow fluff. When this happens--it was pretty quick for me, 1-2 minutes-- turn the speed down and add the vanilla and then continue beating on high. 

  7. When you are satisfied you have marshmallow fluff (fluffy, glossy, spreadable, and it will happen fast ), slow the mixer again and add the cream. Beat on high--the fluff will immediately deflate somewhat and loosen. As soon as it is evenly incorporated, pour the marshmallow glaze over your cake. You will have some leftover.

  8. Let it set for about 5-10 minutes.
  9. Place a rack under the broiler as close as you can get and still fit the cake--for me, with this bundt design, that was 1/3 of the way down.
  10. Place the cooling rack with the cake on top of a cookie sheet to minimize the mess. Place the cake in the oven under the broiler and stay close by with the light on. When it starts to toast, after a minute or so, it will toast quickly--much like a marshmallow over the campfire. As soon as it is toasted to your liking, remove the cake and let it set until cool. The marshmallow will not harden, but it will set and dry out a bit.