Rüblitorte Swiss Carrot Nut Cake With Lemony Icing

Why You’ll Love This Recipe

• Classic Swiss-style Rüblitorte: tender carrot cake enriched with ground nuts for deep, nutty flavor.
• Beautifully moist and delicately spiced, yet light enough to enjoy as an afternoon treat or dessert.
• Bright lemon icing adds a fresh, tangy finish that keeps each slice from feeling heavy.
• Simple to make ahead, keeps wonderfully, and looks stunning on a dessert table.

Grocery List

• Produce: Carrots (about 4–5 medium), 1 lemon (plus an extra if you like a stronger lemon glaze).
• Dairy: 4 large eggs, a small amount of butter (or use oil) for greasing the pan.
• Pantry: Finely ground almonds and/or hazelnuts, all-purpose flour, granulated sugar, powdered sugar, baking powder, neutral oil, ground cinnamon, ground nutmeg, ground cloves (optional), fine salt, vanilla extract (optional), Kirsch or milk (optional), chopped pistachios or marzipan carrots for decoration (optional).

Full Ingredients

For the carrot-nut cake

• Butter or neutral oil, for greasing the pan
• 200 g finely ground almonds or hazelnuts, or a mix (about 2 cups, lightly packed)
• 80 g all-purpose flour (2/3 cup)
• 2 tsp baking powder
• 1/4 tsp fine salt
• 1 1/2 tsp ground cinnamon
• 1/4 tsp ground nutmeg
• Pinch ground cloves (optional, for a subtle warm note)
• 300 g carrots, peeled and very finely grated (about 3 packed cups)
• 4 large eggs, at room temperature, separated
• 180 g granulated sugar (3/4 cup plus 2 tbsp)
• Finely grated zest of 1 untreated lemon
• 60 ml neutral oil, such as sunflower, canola, or grapeseed (1/4 cup)
• 1–2 tbsp Kirsch (cherry brandy) or milk (optional, for traditional aroma and extra moisture)
• 1 tsp pure vanilla extract (optional)

For the lemon icing & decoration

• 180 g powdered (confectioners’) sugar, sifted (about 1 1/2 cups)
• 2–3 tbsp freshly squeezed lemon juice (start with 2 tbsp and add to desired consistency)
• 1–2 tsp hot water, as needed to loosen the icing (optional)
• Chopped pistachios, extra lemon zest, and/or small marzipan carrots, for garnish (optional)

Step-by-Step Instructions

Step 1: Prepare the pan and preheat the oven

Preheat your oven to 180°C / 350°F (conventional, not fan). Lightly grease a 22–24 cm / 9 in round springform or standard cake pan with butter or neutral oil. Line the base with a circle of parchment paper and, if you like, line the sides as well. This will make it much easier to release the delicate, moist cake later.

Step 2: Mix the dry ingredients and grate the carrots

In a medium bowl, whisk together the ground nuts, flour, baking powder, salt, cinnamon, nutmeg, and cloves (if using) until well combined and no lumps remain. This helps distribute the baking powder and spices evenly, so you do not overmix the batter later.

Peel the carrots and grate them very finely on the small holes of a box grater or using the fine-grating disc of a food processor. You want small, delicate shreds so they melt into the cake and keep it moist. Measure out 300 g (about 3 packed cups) and set aside.

Step 3: Beat the egg yolks with sugar and flavorings

Separate the eggs, placing the yolks in a large mixing bowl and the whites in a clean, dry medium bowl (you will whip the whites later). Add the granulated sugar to the yolks.

Using a hand mixer or stand mixer with the whisk attachment, beat the yolks and sugar on medium-high speed for 3–5 minutes, until the mixture is thick, pale, and creamy. It should fall from the beaters in a slowly dissolving ribbon. Beat in the lemon zest, vanilla (if using), and Kirsch or milk (if using). With the mixer on low, slowly stream in the neutral oil and mix just until smooth and combined.

Step 4: Add carrots and nut mixture, then fold in egg whites

Using a spatula, fold the finely grated carrots into the yolk mixture until evenly distributed. Next, add the nut-and-flour mixture in two additions, folding gently just until no dry pockets remain. The batter will be fairly thick at this stage.

Now whip the egg whites: with clean beaters, whip the whites on medium-high speed until they form soft, glossy peaks that just hold their shape when you lift the beaters. Do not overwhip to dry, stiff peaks, or they will be harder to fold in.

Fold one-third of the whipped egg whites into the carrot batter to lighten it, using broad, gentle strokes. Then carefully fold in the remaining whites in two additions, taking care not to deflate them. Stop as soon as the streaks of white disappear and the batter looks even and airy.

Step 5: Bake the Rüblitorte

Scrape the batter into the prepared pan, smoothing the top with a spatula so it bakes evenly. Tap the pan gently on the counter once or twice to release any large air bubbles.

Bake in the preheated oven for 40–45 minutes, or until the top is golden brown and springs back lightly when touched, and a skewer or toothpick inserted into the center comes out clean or with just a few moist crumbs (but no wet batter). If the top is browning too quickly, loosely tent it with a piece of foil for the last 5–10 minutes of baking.

Step 6: Cool the cake completely

Transfer the pan to a wire rack and let the cake cool in the pan for about 10 minutes. Run a thin knife around the edge to loosen, then carefully release the springform ring or turn out the cake, peeling off the parchment. Flip the cake upright (domed side up) onto the rack and let it cool completely. This can take 1–1 1/2 hours.

Do not glaze the cake while it is warm, or the lemon icing will slide off and become too thin.

Step 7: Prepare the lemon icing and decorate

Once the cake is fully cool, prepare the icing. In a small bowl, whisk the sifted powdered sugar with 2 tbsp of fresh lemon juice until smooth and thick. The icing should be pourable but not runny. If it is too stiff, add more lemon juice or a teaspoon or two of hot water, a few drops at a time. If it becomes too thin, whisk in a little more powdered sugar.

Place the cooled cake on a serving plate or a rack set over a tray. Pour the lemon icing in the center of the cake and gently nudge it toward the edges with the back of a spoon, allowing it to drip naturally down the sides for a rustic look. While the glaze is still wet, sprinkle with chopped pistachios, extra lemon zest, and/or marzipan carrots.

Let the icing set at room temperature for 20–30 minutes before slicing. Use a sharp knife, wiping it clean between cuts for neat slices.

Pro Tips

• Grate the carrots very finely. Fine shreds melt into the batter and keep the cake moist without turning stringy. Coarse grating will change the texture.
• Do not overwhip or overfold the egg whites. Soft peaks and gentle folding give the cake its light, tender crumb. Overwhipped whites are harder to incorporate and can deflate when mixed.
• Use freshly ground nuts if possible. Grinding whole nuts just before baking (or using high-quality ground nuts) gives a fresher, more aromatic flavor than old nut meal.
• Adjust the lemon icing thickness. Aim for a thick ribbon that slowly sinks back into itself. Too thin and it will run off; too thick and it will not spread smoothly.
• Let the cake rest. This Rüblitorte is even better the next day as the flavors of nuts, spices, and lemon meld and the crumb becomes extra moist.

Variations

• Gluten-free Rüblitorte: Replace the flour with an equal weight of fine almond meal or a 1:1 gluten-free baking blend. The cake will be slightly more delicate but still wonderfully moist.
• Orange-spiced version: Swap the lemon zest in the batter for orange zest, and use orange juice in the icing instead of lemon for a softer, sweeter citrus aroma.
• Cream cheese topping: Instead of lemon glaze, frost the fully cooled cake with a light cream cheese frosting (cream cheese, a little butter, powdered sugar, and lemon juice) for a richer dessert-style finish.

Storage & Make-Ahead

Once the icing has set, cover the cake loosely with a cake dome or wrap the plate in plastic wrap. It keeps well at cool room temperature for up to 2 days, or in the refrigerator for up to 5 days. For the best texture, bring refrigerated slices back to room temperature before serving.

You can also bake the cake a day in advance, wrap it (without icing) once completely cool, and store at room temperature. Glaze it on the day you plan to serve. Leftover slices freeze well: wrap each slice tightly in plastic and then in foil, or place in an airtight container, and freeze for up to 2 months. Thaw at room temperature, still wrapped, before enjoying.

Nutrition (per serving)

Approximate values per slice (1 of 12): about 310 calories; 16 g fat; 39 g carbohydrates; 6 g protein; 2 g fiber; 26 g sugars; 120 mg sodium. Values will vary depending on specific ingredients, nut choice, and decorations.