01 -
Butter and flour two 23-centimetre cake pans. Prepare chocolate cake batter as directed on the package.
02 -
Bake in preheated oven following package instructions. Allow cake layers to cool completely in pans before removing.
03 -
Place the first cake layer on a serving platter.
04 -
In a large bowl, beat together softened butter, confectioners’ sugar, marshmallow crème, vanilla extract, and a pinch of kosher salt with a hand mixer until light and fluffy.
05 -
Spread a portion of the prepared frosting on the first cake layer. Position the second cake layer on top.
06 -
Heat heavy cream in a small saucepan just until it starts to bubble. Place chocolate chips in a heatproof bowl, pour over hot cream, and let stand 2 minutes. Whisk until smooth and fully combined.
07 -
Pour ganache evenly over cake layers, allowing it to drip over the sides. Pipe vanilla icing in a spiral on top, then use a toothpick to drag lines outward from the centre, creating a spiderweb pattern.