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Desserts · Part 2 of 3: Instructions

Rich Chocolate Wacky Cake with Frosting Step-by-step instructions

A moist square of chocolate wacky cake topped with white frosting in a glass dish.
Prep
Cook
Total
Serves
9
Includes 15 min resting

Before you start

Before you begin, ensure your workspace is clean and you have all your tools ready, including the mini spatula and a serving plate. If you have baked the cake ahead of time, make sure it has cooled completely on a wire rack.

Having the frosting at room temperature will make it easier to spread evenly across the surface. Clear enough space on your counter to work comfortably and ensure your serving plates are clean and ready for plating.

Ingredients at a glance (2)
  • 1 square chocolate wacky cake, made ahead
  • 1 cup white frosting, store-bought or made ahead

Instructions

Preparing the cake base

  1. Prepare the cake base
    Ensure the chocolate wacky cake is fully baked and cooled in the square glass baking dish. The cake should be moist and set before adding any toppings.
    Look for The cake should be room temperature and firm to the touch.
    Tip Allowing the cake to cool completely ensures the texture remains tender.

The cake should be fully baked and cooled to room temperature. The surface should be matte and firm, providing a stable foundation for the frosting. Check that the edges are clean and that the cake is not sticking to the sides of the glass dish.

Applying the frosting

  1. Apply the frosting
    Spread the white frosting evenly over the top of the cooled chocolate cake. Use a spatula to create a textured finish on the surface of the frosting.
    Look for The frosting should be spread in an even, textured layer across the cake.
    Tip Use a mini spatula for better control when creating texture on the frosting.

The frosting should be spread in an even layer across the entire surface of the cake. The texture should be consistent, with visible peaks or swirls created by the spatula. Ensure the frosting reaches the edges of the dish for a uniform look.

Slicing and serving

  1. Slice and serve
    Use a mini spatula to lift a square of the frosted cake from the glass dish. Transfer the slice onto a plain white plate and serve with a fork.
    Look for The slice should be moist and hold its shape when lifted.
    Tip Wipe the spatula clean between slices for a neat presentation.

Each slice should be lifted cleanly from the dish, maintaining its square shape. The contrast between the dark chocolate cake and the white frosting should be clear. The final plate should look inviting and be ready to serve immediately.

Common mistakes

A common mistake is attempting to frost the cake while it is still warm, which will cause the frosting to melt and slide off. Always wait until the cake is completely cool to the touch.

Another error is pressing too hard with the spatula when applying the frosting, which can damage the delicate surface of the cake. Use a light touch to create the texture. Finally, ensure you are using the correct size baking dish to avoid uneven cooking.

How to tell it’s done

The cake is done when it is moist, tender, and holds its shape when lifted with a spatula. The edges should be slightly set, and the center should be firm to the touch.

When cutting into the cake with a fork, it should feel soft and fluffy, indicating that it has been baked to the correct consistency.

There is no protein involved, so you do not need to worry about internal temperatures, just the overall texture and appearance.

Coming up in Part 3: common questions

  • Can this cake be made without the white frosting?
  • Why is the cake so moist?
  • Can this recipe be doubled?

Also in Part 3: variations (Chocolate Ganache Topping, Fruit Topped), storage and make-ahead, and the printable recipe card.

Up next · Part 3 of 3

2 variations · storage & make-ahead · 3 answers · printable card

Tips, FAQ & printable recipe (Part 3)← Back to the ingredients (Part 1)