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Desserts · Part 2 of 3: Instructions

Fudgy Chocolate Sauerkraut Cake with Glossy Frosting Step-by-step instructions

A fork pulling a piece out of a rich, dark chocolate cake with glossy, swirled fudge frosting.
Prep
Cook
Total
Serves
12
Includes 15 min resting

Before you start

Before beginning, ensure all ingredients are at room temperature to allow for better emulsification of the batter. Preheat the oven to 350°F (175°C) and grease the baking dish thoroughly with butter or a non-stick spray to prevent sticking.

Prepare the sauerkraut by rinsing it under cold water, draining it well in a fine-mesh colander, and mincing it finely with a sharp chef's knife.

Having all components measured and ready on the counter will make the mixing process smooth and efficient, ensuring the batter goes into the oven immediately once combined.

Ingredients at a glance (2)
  • 1/2 cup sauerkraut, rinsed and drained
  • 2 cups chocolate fudge frosting, store-bought or made ahead

Instructions

Preparation and Rinsing

  1. Prepare the sauerkraut
    Rinse the sauerkraut thoroughly under cold running water in a colander to remove the brine. Drain well, then chop it finely to ensure it blends seamlessly into the batter. This step is essential for distributing the moisture evenly.
    Look for Sauerkraut should be finely minced and mostly flavorless, serving only to provide moisture.
    Tip Ensure the sauerkraut is very well drained before adding it to the bowl.

The sauerkraut must be completely rinsed of its brine. Check that the strands are finely chopped so they are uniform in size, which prevents large, detectable pieces in the finished cake. The colander should be clean, and the sauerkraut should be drained of all excess liquid before it is added to the mixing bowl.

Mixing and Baking

  1. Mix and bake the cake
    In a large bowl, combine the base ingredients. Fold in the prepared sauerkraut. Transfer the batter into a greased 9x9 inch baking dish and bake at 350°F (175°C) for 40 minutes. Ensure the internal temperature reaches 160°F (71°C) to safely cook the eggs within the batter.
    Look for The batter will be thick, and the cake should pull away slightly from the edges.
    Safe temperature 160°F (71°C) internal temperature (egg dishes)
    Tip Use a toothpick to check the center; it should come out clean.

The batter should be thick, glossy, and homogeneous. After baking, the cake must have a firm structure that springs back lightly when pressed. Ensure the oven temperature is stable throughout the 40 minutes of baking to avoid uneven rising or a sunken center, which can occur if the heat fluctuates.

Cooling and Frosting

  1. Frost the cake
    Allow the cake to cool completely in the dish for at least 15 minutes before frosting. Once cooled, use an offset spatula to spread the chocolate fudge frosting over the top, creating elegant swirls to achieve the signature look.
    Look for The frosting should be thick and glossy as you spread it.
    Tip Warm the offset spatula slightly in hot water for a smoother finish.

The cake must be completely cool to the touch before the frosting is applied. Check the texture of the fudge frosting; it should be spreadable but firm enough to hold the swirls. If the frosting appears too soft, let it sit at room temperature for a few minutes to thicken before beginning.

Common mistakes

A common error is failing to rinse the sauerkraut thoroughly, which can leave a salty or overly acidic aftertaste in the finished cake. Another mistake is over-mixing the batter; fold the ingredients gently until just combined to ensure the cake remains tender rather than tough.

Finally, applying the frosting while the cake is still warm will cause the fudge to melt and slide off, so patience during the cooling phase is absolutely essential for a clean, professional finish.

How to tell it’s done

The cake is done when a toothpick inserted into the center emerges clean or with just a few moist crumbs attached. The top should feel set to the touch, and the edges will begin to pull slightly away from the sides of the baking dish.

Because this cake is intentionally moist, it will retain a dense, fudgy quality even when fully baked. Ensure the internal temperature reaches 160°F (71°C) to safely cook the eggs within the batter, then allow the cake to cool fully before frosting.

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

Coming up in Part 3: common questions

  • Can the sauerkraut be tasted in the final cake?
  • Is it possible to use a different type of frosting?
  • How can the cake be prevented from drying out?

Also in Part 3: variations (Mocha Sauerkraut Cake, Spiced 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)