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Desserts · Part 2 of 3: Instructions

Decadent Chocolate Wacky Cake Step-by-step instructions

A rich, moist chocolate cake in a clear square glass baking dish on a granite counter.
Prep
Cook
Total
Serves
9
Includes 30 min resting

Before you start

Before you begin, gather all your ingredients and ensure your oven is preheated to 350°F (175°C). Clear your counter space and have your mixing bowl, whisk, and spatula ready.

Preparing your workspace in advance allows for a smooth baking process and helps you focus on the details of mixing and frosting without any unnecessary interruptions or delays.

Ingredients at a glance (2)
  • 1 box chocolate cake mix
  • 1 cup fluffy white frosting

Instructions

Mixing the Batter

  1. Prepare the batter
    Preheat your oven to 350°F (175°C). In a mixing bowl, prepare the chocolate cake mix according to the package instructions. Ensure the batter is smooth and well-combined before pouring it into the square glass baking dish.
    Look for The batter should be smooth and free of large lumps.
    Tip Whisk the batter thoroughly to ensure a consistent crumb texture.

The batter should be smooth, glossy, and free of any dry pockets. It should have a consistent color throughout, indicating that the ingredients are well-incorporated. Ensure the consistency is uniform before transferring it to the baking dish.

Baking the Cake

  1. Bake the cake
    Place the baking dish into the preheated oven. Bake for 30 to 35 minutes, or until a toothpick inserted into the center comes out clean. Remove the dish from the oven and set it on a wire rack to cool completely.
    Look for The cake should be firm to the touch and pulling slightly away from the edges.
    Tip Avoid opening the oven door too frequently during the first 20 minutes of baking.

The cake should have risen evenly and have a uniform, spongy appearance. The surface should be firm, and the edges should look set. A toothpick test will confirm that the center is fully cooked and ready for cooling.

Frosting the Cake

  1. Frost and serve
    Once the cake has cooled completely to room temperature, use a spatula to spread the fluffy white frosting evenly over the surface. Create decorative swirls if desired, then slice into squares to serve.
    Look for The frosting should hold its shape and spread smoothly across the surface.
    Tip Ensure the cake is fully cooled before frosting to prevent the topping from melting.

The frosting should be thick, creamy, and easy to spread. Once applied, it should hold its shape and create a smooth, decorative surface.

The final result should look inviting, with a clear distinction between the moist cake and the fluffy topping.

Common mistakes

A common mistake is frosting the cake while it is still warm, which causes the frosting to melt and lose its fluffy texture.

Another error is overmixing the batter, which can lead to a dense, tough cake rather than the desired light and spongy crumb. Finally, ensure the cake is completely cool before slicing to prevent it from crumbling or sticking to the knife.

How to tell it’s done

The cake is done when a toothpick inserted into the center comes out clean. The top should be springy to the touch, and the edges should be slightly pulling away from the sides of the glass dish.

Allow the cake to cool for at least 30 minutes before applying the frosting to ensure the best possible texture and appearance.

Coming up in Part 3: common questions

  • Can this cake be made in a different pan size?
  • Why is it important to cool the cake completely before frosting?
  • How can you tell if the cake is overbaked?

Also in Part 3: variations (Chocolate Mint Cake, Double Chocolate Cake), 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)