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The Ultimate Layer Snack Cake

Each layer of this Ultimate Layer Snack Cake features a classic treat: chocolate chip cookies, Rice Krispie treats, and brownies. The entire cake is topped off with a rich chocolate ganache and heap of rainbow sprinkles.
Prep Time 30 minutes
Cook Time 30 minutes
Total Time 1 hour

Ingredients

Chocolate Chip Cookie Layer

  • 1 cup all-purpose flour
  • ¼ tsp baking soda
  • ¼ tsp salt
  • ¼ cup unsalted butter room temp
  • ¼ cup packed brown sugar
  • 1 large egg yolk
  • 1 tsp vanilla
  • ¼ cup chocolate chips

For Brownie Layer

  • 3 tbsp cocoa
  • ¼ cup all-purpose flour
  • ⅛ tsp salt
  • ⅛ tsp baking powder
  • ¼ cup unsalted butter melted
  • ½ cup granulated sugar
  • 1 large egg
  • 1 tsp vanilla
  • ¼ cup mini-chocolate chips

Rice Krispie Layer

  • 2 tbsp unsalted butter
  • 2 cup mini marshmallows
  • 3 cup Rice Krispies
  • 3 tbsp rainbow sprinkles

Vanilla Frosting

  • 2 sticks unsalted butter room temp
  • 2 cup confectioner's sugar
  • 1 ½ tsp vanilla extract
  • 1 tsp cream or whole milk

For Ganache

  • 4 oz chocolate chopped
  • ½ cup heavy cream

Instructions

Chocolate Chip Cookie Layer

  • Line the bottom of a 6-inch round cake pan with parchment paper and grease.
     In a small bowl, mix the flour, baking soda, and salt.
  • In a medium bowl, using a wooden spoon, mix the butter and brown sugar until fluffy. Add the egg yolk and vanilla. Mix until combined. Mix in the chocolate chips.
  • Spread the batter in the cake pan. Smooth until even.
    Bake for 20 to 25 minutes, until the center of the cookie is just set. (Do NOT overcook the cookie otherwise it will be difficult to cut the cake.)
  • Allow the cookie to cool in the pan for about 15 min. Then remove the cookie from the pan, and allow it to cool completely on a cooling rack.

Brownie Layer

  • Prepare the 6-inch pan in the same manner as you did for the cookie layer. In a small bowl, mix the flour, cocoa, salt, and baking powder. In a medium bowl, mix the butter, sugar, egg, and vanilla.
  • Add the dry ingredients to the egg mixture. Mix in the chocolate chips. Pour into the prepared pan and smooth the top.
  • Bake for 15 minutes. Allow the brownie to cool in the pan for about 15 min. Turn the brownie out of the pan and allow it to cool completely on a cooling rack.

Rice Krispie Layer

  • Prepare a 6-inch circle pan as described above. In a large pan, melt the butter and marshmallows over medium heat.
  • Once the marshmallows are completely melted, remove the pan from the heat. Add the cereal and mix. Once the mixture has cooled a bit, but is still pliable, add the rainbow sprinkles. Mix until combined.
  • Pour into the prepared pan. Allow the mixture to cool in the pan completely - about ½ an hour. Remove the cereal treat from the pan.

Frosting

  • To make the frosting, in the bowl of a mixer fitted with a paddle attachment, beat the butter and confectioners' sugar until light and fluffy.
  • Add the salt, vanilla, and cream. Mix until light and fluffy.

Assemble the Cake

  • To assemble the cake, place the brownie layer on a cake stand. Spread about ¼ cup of frosting over the top.
  • Add the Rice Krispie treat layer on top of the brownie layer and spread another ¼ cup frosting. Add the chocolate chip cookie layer. Set the cake aside while making the chocolate ganache.
  • Place the chopped chocolate in a medium bowl. Heat the cream until its just about to boil.
  • Pour the hot cream over the chopped chocolate. Allow it to sit for a minute or two. Then mix until smooth and shiny.
    Pour the chocolate ganache over the cake and sprinkle with rainbow jimmies.