S'mores Layer Cake: Graham cracker cake layered with creamy chocolate ganache, covered in toasted marshmallow buttercream.
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S'mores Layer Cake

Graham cracker cake layered with creamy chocolate ganache, covered in toasted marshmallow buttercream.
Prep Time15 mins
Cook Time30 mins
Total Time45 mins
Servings: 10 -12 servings
Author: freshaprilflours.com

Ingredients

GRAHAM CRACKER CAKE

  • 12 full sheets of graham crackers crushed into a fine powder (approximately 1 and ½ cups)
  • 1 and ½ cups all purpose flour
  • 4 teaspoons baking powder
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1 cup unsalted butter softened to room temperature
  • 1 cup firmly packed light brown sugar
  • 1/2 cup granulated sugar
  • 4 large eggs
  • 2 teaspoons vanilla extract
  • 1 cup Greek yogurt any fat content

CHOCOLATE GANACHE FILLING

  • 8 ounces quality semi-sweet chocolate finely chopped
  • 4 ounces heavy cream
  • 1 Tablespoon unsalted butter

MARSHMALLOW BUTTERCREAM

  • 1/2 cup unsalted butter softened to room temperature
  • 1 7 ounce container marshmallow creme
  • 1 and ½ cups powdered sugar

Instructions

GRAHAM CRACKER CAKE

  • Preheat the oven to 350ºF. Generously grease and flour (or use Wilton's Cake Release) two 8" round cake pans.
  • In a medium size bowl, toss together the graham cracker crumbs, flour, baking powder, baking soda, and salt. Set aside.
  • In a large bowl with a handheld mixer or the bowl of a stand mixer fitted with the paddle attachment, cream both sugars and butter until light and fluffy (approximately 3 minutes). Add the eggs one at a time, insuring each egg is completely combined before adding the next, and beat on medium speed until smooth. Add the vanilla, and beat again until combined. Scrape down the sides and bottom of the bowl with a spatula. Turn mixer speed to low and slowly add the graham cracker in 2 additions, alternating with the Greek yogurt. Beat until completely combined.
  • Pour the batter evenly between the two prepared cake pans. Bake for 28-30 minutes or until a toothpick inserted in the center comes out mostly clean. Remove from oven and allow to cool completely on a wire rack before assembling.

CHOCOLATE GANACHE FILLING

  • Place the finely chopped chocolate into a medium size bowl. Set aside.
  • In a small saucepan over medium heat, combine the heavy cream and butter and heat to steam. Remove from heat and immediately pour over the bowl of chocolate. Allow to sit for a few minutes, then carefully stir mixture until all of the chocolate is melted. Allow to cool completely at room temperature before using.

MARSHMALLOW BUTTERCREAM

  • In a large bowl with a handheld mixer or the bowl of a stand mixer fitted with the paddle attachment, cream the butter until it is light and fluffy. Add the marshmallow creme and beat on high until smooth (approximately 2 minutes).
  • With the mixer on low, add the powdered sugar. Increase mixer speed to medium and beat until completely combined (approximately 1 minute).

ASSEMBLE THE CAKE

  • Trim cooled cake layers to create a flat surface. You can do this with a large serrated knife or a cake leveler. I cut each layer in half so I had 4 layers total. Place one layer on a plate or cake stand and cover the top with chocolate ganache. Spread evenly with an offset spatula. Repeat this step until you have used all of your layers, placing the very top layer cut surface down.
  • For a sturdier cake, refrigerate at this point for about 10 minutes. When cake is slightly chilled, remove from refrigerator and spread a generous layer of marshmallow buttercream on the top of the cake. Spread a thinner layer around the sides. Use a kitchen torch to toast just the top of the cake (the sides will melt). Leftovers stay fresh, covered at room temperature up to 3 days and in the refrigerator up to 5 days.
  • Make ahead: prepare cakes and frosting up to 1 day in advance. Cover cakes tightly and keep at room temperature or in the refrigerator until ready to assemble. Unfrosted cake layers may be frozen, wrapped tightly, up to 2 months.