S'mores [Layer] Cake

My youngest two girls and I decided we wanted to try something new for dessert on Father's day this year so we came up with this recipe. I made it into a layer cake on the test run, but I would probably go with a simple 9x13, one layer version next time to save time. I may also come up with some other options to make it look a bit prettier in the future.
After making this, I searched online to see if I could put the whole cake under the broiler to give it that toasted look of a roasted marshmallow. I found that you need a cooking torch, but I also saw a s'mores cake recipe that used a graham cracker cake and added whipped chocolate ganache between the layers. I may have to come up with a recipe for graham cracker cake now... 😁

Cake (if you want to make the cake from scratch, too, here is my favorite recipe)

• 1 box devils food cake mix
• 1 cup cold coffee
• 1/3 cup oil
• 3 eggs
• 1/2 cup mini chocolate chips

Frosting

• 1/2 recipe marshmallow fluff or one store-bought package
  (I use this recipe as it gives great tips/tricks on make the fluff. I did add the measurement for using liquid egg whites as a friend gave me 5 containers of it.)
  1/3 cup water
  3/4 cup granulated sugar
  3/4 cup corn syrup or honey
  3 large egg whites (or 4 oz liquid egg whites) room temperature
  1/2 tsp cream of tartar
  1 tsp vanilla extract
• 2-3 graham crackers, crushed (I use a ziptop bag and a meat mallet)
• melted chocolate to drizzle, optional

Utensils

• Two 8" round cake pans or a 9"x13"cake pan
• Stand mixer preferred, but hand mixer required (if making your own marshmallow fluff)
• Cake plate, if making a layer cake

Directions

1. Mix the cake mix, coffee, eggs, and oil. Pour into cake pan(s), top with chocolate chips, and bake at 350 degrees F for 24-35 minutes (24-29 with two 8" round pans, or 29-35 with a 9"x13" pan). 
2. Prep marshmallow fluff if making from scratch.
3. Let cake(s) cool. Top each layer with fluff, graham cracker crumples, and chocolate drizzle (optional).

Note: If you have an electric pellet smoker, you could bake your cake(s) on it to add the smoky flavor of a s'more.