Skip to content
Allquickyrecipes Search recipes

Desserts · Part 2 of 3: Instructions

Ultra-Fudgy Wacky Cake with Creamy Vanilla Frosting Step-by-step instructions

A square glass baking dish filled with a rich, dark chocolate cake topped with thick
Prep
Cook
Total
Serves
9
Includes 20 min resting

Before you start

Before beginning, ensure the chocolate cake is fully baked and completely cooled to room temperature. Having a clean spatula ready will make the frosting process smooth and efficient.

Clear a space on your countertop to place the baking dish, ensuring you have enough room to work comfortably.

If the frosting has been stored in the refrigerator, let it sit at room temperature for a few minutes to soften slightly, making it easier to spread over the cake.

Ingredients at a glance (2)
  • 1 dish chocolate cake, baked
  • 1 cup vanilla frosting, store-bought or made ahead

Instructions

Cooling the Cake

  1. Prepare the Cake
    Ensure the chocolate cake is fully baked and cooled to room temperature before beginning the assembly process. Place the square glass baking dish on a stable granite countertop.
    Look for The cake should be firm to the touch and completely cool.
    Tip Cooling the cake prevents the frosting from melting upon contact.

The cake should be completely cool to the touch. The surface should be firm and dry, providing a stable base for the frosting. Check that there is no residual heat radiating from the pan before proceeding to the next step.

Frosting Application

  1. Apply Frosting
    Scoop the vanilla frosting onto the center of the cooled cake. Use a spatula to swoosh and spread the thick white frosting across the entire surface of the rich dark cake until it is evenly covered.
    Look for The frosting should form a smooth, thick, and consistent layer.
    Tip Use long, sweeping motions with the spatula for a professional finish.

The frosting should be thick, creamy, and easy to spread. As you work, the frosting should glide smoothly across the surface of the cake. Ensure the entire top is covered with a consistent, uniform layer of vanilla frosting.

Final Presentation

  1. Serve the Cake
    Once frosted, cut the cake into squares. Serve immediately or keep chilled until ready to enjoy. Ensure any leftovers are refrigerated within two hours to maintain food safety.
    Look for The cake should be moist and the frosting should be set.
    Safe temperature 160°F (71°C) internal temperature (egg dishes)
    Tip Wipe the knife between cuts for clean edges.

The cake should look polished, with the white frosting contrasting against the dark chocolate cake. The edges should be clean after cutting, and the overall appearance should be inviting and ready for immediate serving.

Common mistakes

A common mistake is applying the frosting while the cake is still warm, which causes the frosting to melt and slide off the surface.

Another error is using a dull knife to cut the cake, which can tear the delicate crumb. Finally, ensure the frosting is spread in an even layer to maintain the balance of flavors in every bite.

How to tell it’s done

The cake is done when the top feels springy to a gentle touch and the edges have pulled slightly away from the sides of the baking dish.

A toothpick inserted into the center of the cake should come out clean or with only a few moist crumbs attached. Ensure the internal temperature of the cake, which contains eggs, reaches 160°F (71°C) to be fully cooked through.

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

Coming up in Part 3: common questions

  • Can this cake be made in a round pan?
  • Why is the cake called wacky?
  • Is it possible to use a different type of flour?

Also in Part 3: variations (Chocolate Ganache Topping, Powdered Sugar Dusting), 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)