Classic Ding Dong Sheet Cake with Creamy Filling Step-by-step instructions

Before you start

Before beginning the assembly, ensure the chocolate sponge is fully baked and has cooled to room temperature, as warm cake will cause the cream filling to melt. Prepare your work area by clearing sufficient space for the 9x13 inch pan and have your offset spatula and knife ready.

If using a pre-made cream filling, ensure it is whipped to a stiff consistency that holds its shape, as this is crucial for the structural integrity of the cake layers.

Instructions

Cake Base Preparation

1. 1Prepare the cake base
   Place the cooled chocolate sheet cake onto a flat work surface. If the cake was baked in the pan, carefully remove it or ensure the surface is level for spreading the filling. Trim the edges if necessary to achieve clean, straight lines for the final assembly.
   Look for The cake should be completely cool to the touch before proceeding.
   Tip Using a serrated knife helps in trimming the edges neatly without tearing the delicate sponge.

The cake base should be level and completely cool. Check that the edges are clean and the surface is free of crumbs, which ensures that the cream layer adheres properly without picking up stray cake particles during the spreading process.

Cream Layering

2. 2Add the creamy center
   Spread the whipped cream filling evenly over the surface of the chocolate cake. Use an offset spatula to smooth the cream into a consistent, thick layer across the entire top of the sponge. Ensure the edges are covered well so the filling is visible when the cake is sliced.
   Look for The cream layer should be perfectly smooth and level.
   Tip Chill the cake for 15 minutes after spreading the cream to firm it up before adding the ganache.

The cream should be spread in an even, uniform layer across the top of the cake. Verify that the filling reaches the very edges of the sponge, creating a solid, thick barrier that will support the upcoming ganache layer.

Ganache Finish

3. 3Apply the ganache and serve
   Pour the chocolate ganache over the chilled cream layer. Gently spread it with a spatula to cover the entire top, allowing it to settle into a glossy, smooth finish. Heat the egg-based custard component of the ganache to 160°F (71°C) to ensure it is cooked through. Refrigerate the cake for at least 30 minutes to set the ganache before slicing into even squares and serving immediately.
   Look for The ganache should appear dark, shiny, and set to the touch.
   Safe temperature 160°F (71°C) internal temperature (egg dishes)
   Tip Dip your knife in warm water and wipe it dry between cuts to get professional-looking slices.

The ganache should be glossy, smooth, and fully set after the final refrigeration period. Check that the glaze is opaque and covers the cream completely, and ensure the knife cuts are sharp and clean, revealing the distinct layers of the cake.

Common mistakes

A common mistake is applying the cream filling while the cake is still warm, which leads to a soggy sponge and a messy, uneven layer.

Another error is failing to chill the cake between the filling and ganache steps; this is essential for preventing the colors from bleeding into each other.

Finally, avoid using a dull knife when slicing, as this will crush the delicate layers and ruin the visual appeal of the finished squares.

How to tell it’s done

The cake is considered done when the chocolate sponge is springy to the touch and a toothpick inserted into the center comes out clean.

After assembly, the cake reaches its final state when the ganache is set and no longer tacky to the touch. Ensure the egg-based components are cooked to 160°F (71°C) for food safety.

• Egg dishes: 160°F (71°C) in the thickest part