Icelandic Rhubarb Cake – Quick 25-Minute Dessert

Quick, buttery, and just the right hint of tartness. Desserts & Baking .

Fluffy Icelandic rhubarb cake ready in 25 minutes, serves 10, sweet‑tart and comforting.

Published: April 7, 2026
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Icelandic Rhubarb Cake – Quick 25-Minute Dessert | Delicious Recipes & Tips - Food Nity Food Blog
The Icelandic rhubarb cake traces its roots to the remote farms of southern Iceland, where early settlers used rhubarb to add a bright note to otherwise simple wheat breads. Over centuries, the recipe evolved into a soft, tender cake that balances the island’s cool climate with a comforting sweetness, making it a beloved dessert in Nordic households.

Why You'll Love It

  • - It comes together in under half an hour, so no long wait.
  • - The rhubarb gives a gentle tang that brightens the sweetness.
  • - Moist, buttery crumb that stays fresh for days.
  • - Simple pantry staples; no fancy equipment needed.

*"The cake was light, fragrant, and perfectly balanced—my family couldn’t stop asking for seconds!"*

Essential Ingredient Guide

  • Rhubarb stalks: Choose firm, deep‑red stalks; trim the ends and slice thinly to release their gentle tartness.
  • All‑purpose flour: Use a lightly sifted flour for a tender crumb; avoid over‑mixing.
  • Unsalted butter: Room‑temperature butter creates a smooth batter and adds a rich mouthfeel.
  • Granulated sugar: Balances the rhubarb’s acidity; you can adjust a tablespoon for a sweeter profile.
  • Lemon zest: A small amount lifts the flavor, adding a bright, citrusy nuance.
  • Vanilla extract: A dash gives depth without overpowering the rhubarb.

Complete Cooking Process

  • Ingredient Readiness:

    Gather and measure everything, then slice the rhubarb and let it sit with a pinch of sugar while you cream butter.

  • Flavor Development:

    Cream butter and sugar until light, then fold in the rhubarb—its juices meld with the butter, creating a fragrant base.

  • Texture Control:

    Add dry ingredients gently; over‑mixing would toughen the crumb, so stir just until combined.

  • Finishing Touches:

    Spread a thin layer of sugar on top; it caramelizes as the cake bakes, giving a subtle crunch.

  • Serving Timing:

    Allow the cake to cool slightly in the pan, then turn onto a wire rack; it’s best served warm.

  • Pro Tips

    • Slice rhubarb uniformly for even baking.
    • Use a light hand when folding flour.
    • Let the batter rest 5 minutes before baking for a fluffier rise.
    • Dust with powdered sugar just before serving.

    I often find that a short rest lets the flour hydrate fully, resulting in a softer crumb. Also, a quick dusting of powdered sugar adds a whisper of sweetness without masking the natural tartness. It’s those little moments—like watching the edges turn golden—that make baking feel like a quiet celebration.

Cooking Icelandic Rhubarb Cake – Quick 25-Minute Dessert | Delicious Recipes & Tips - Food Nity Food Blog

The essence of the dish:

A tender cake that carries the bright zing of rhubarb, balanced by buttery sweetness and a whisper of lemon.

A fun fact or historical angle:

In Iceland, rhubarb was once a staple winter fruit, cherished for its ability to thrive in short daylight.

Flavor or sensory focus:

First bite offers a soft, melt‑in‑your‑mouth texture, followed by a gentle tartness that awakens the palate.

You Must Know

  • Do not over‑beat the batter.
  • Use fresh rhubarb for best flavor.
  • Cool on a rack to keep the crust crisp.

Frequently Asked Questions

→ Can I use frozen rhubarb?

Yes, thaw it fully and pat dry; the texture will be slightly softer but the flavor remains bright.

→ How do I store leftovers?

Wrap tightly in plastic wrap and keep at room temperature for up to two days, or refrigerate for up to a week.

→ Can I make this gluten‑free?

Swap the all‑purpose flour for a 1:1 gluten‑free blend; the texture stays tender.

→ What’s a good frosting?

A light whipped cream with a touch of lemon zest pairs beautifully.

→ Will it rise without baking powder?

A teaspoon of baking powder is essential for that airy lift.

→ Can I add nuts?

Chopped almonds or walnuts add lovely crunch; fold them in with the rhubarb.

Chef's Tips

Do not over‑mix; the batter should be just combined.,If rhubarb releases too much liquid, drain briefly before adding to the cake.,A quick drizzle of honey on warm slices adds a lovely shine.

Nutrition Facts

per serving

320

Calories

5g

Protein

40g

Carbs

14g

Fat

Fiber: 2g
Sugar: 22g
Sodium: 160mg

Taste Profile

🍯 Sweet
Medium
🧂 Salty
Low
🌶️ Spicy
None
🍋 Sour
Medium
🍖 Umami
Low

A balanced sweet‑tart flavor with buttery richness.

Ingredient Substitutions

Don't have an ingredient? Try these alternatives

Butter Margarine or coconut oil

Margarine works but may alter flavor; coconut oil adds a subtle hint.

Milk Almond milk

Provides a dairy‑free option with a slight nutty note.

Recipe Variations

Try these delicious twists on the original

Spicy Version

Add a pinch of ground ginger and a dash of red pepper flakes for warmth.

Mediterranean Style

Fold in crumbled feta and toasted pine nuts for a savory twist.

Common Mistakes to Avoid

Learn from others' mistakes for perfect results

  • Over‑mixing the batter, which creates a tough crumb.
  • Using overly watery rhubarb; be sure to drain excess liquid.
  • Opening the oven door too often; it drops the temperature.

Meal Prep & Storage

Make Ahead Tips

You can slice and toss the rhubarb with sugar a night before; keep refrigerated and bring to room temperature before baking.

Leftover Ideas

Gently reheat slices in a skillet over low heat, covered, to restore softness.

Perfect Pairings

Serve this with...

A cup of lightly brewed Earl Grey tea Vanilla bean ice cream on the side Fresh berries with a drizzle of honey

Cooking Timeline

0-5 min

Preheat oven, prepare pan, and slice rhubarb.

5-10 min

Cream butter and sugar; add eggs and vanilla.

10-15 min

Combine wet and dry ingredients, fold gently.

15-20 min

Layer batter and rhubarb in pan, sprinkle top sugar.

20-30 min

Bake; check doneness with toothpick.

30-35 min

Cool slightly, then turn out onto rack.

Icelandic Rhubarb Cake – Quick 25-Minute Dessert

Icelandic Rhubarb Cake – Quick 25-Minute Dessert

A fluffy, sweet‑tart Icelandic rhubarb cake that comes together in just 25 minutes, perfect for a family gathering or a quiet afternoon treat.

Author: Amelia Hart

Timing

Prep Time

15 Minutes

Cook Time

25 Minutes

Total Time

40 Minutes

Recipe Details

Category: Desserts & Baking
Difficulty: Easy
Cuisine: Icelandic
Yield: 10 Servings Servings
Dietary: Vegetarian

Ingredients

Cake Base

  • 01 2 cups all‑purpose flour
  • 02 1 ½ tsp baking powder
  • 03 ¼ tsp salt
  • 04 ¾ cup unsalted butter, softened
  • 05 ¾ cup granulated sugar
  • 06 2 large eggs
  • 07 1 tsp vanilla extract
  • 08 ¼ cup milk
  • 09 1 tbsp lemon zest

Rhubarb Filling

  • 01 3 cups rhubarb stalks, trimmed and sliced
  • 02 3 tbsp granulated sugar
  • 03 1 tbsp butter, melted

Instructions

Step 01

Preheat the oven to 350°F (175°C) and grease a 9‑inch round cake pan; I like to line the bottom with parchment for easy release.

Step 02

In a bowl, toss the sliced rhubarb with 3 tbsp sugar and let it sit while you cream the butter and ¾ cup sugar until pale and fluffy.

Step 03

Add eggs one at a time, mixing gently; then stir in vanilla, lemon zest, and melted butter.

Step 04

In a separate bowl, whisk flour, baking powder, and salt; fold into the wet mixture just until combined.

Step 05

Pour half the batter into the pan, spread the softened rhubarb mixture over it, then top with the remaining batter; sprinkle a light dusting of sugar on top.

Step 06

Bake for 25‑30 minutes, or until a toothpick inserted into the center comes out clean. Let cool 10 minutes before turning out.

Notes & Tips

  • 1 Do not over‑mix; the batter should be just combined.
  • 2 If rhubarb releases too much liquid, drain briefly before adding to the cake.
  • 3 A quick drizzle of honey on warm slices adds a lovely shine.

Tools You'll Need

  • 9‑inch round cake pan

  • Mixing bowls

  • Hand mixer or whisk

  • Spatula

  • Measuring cups and spoons

  • Cooling rack

Must-Know Tips

  • Don't over‑beat the batter, it makes the cake dense.
  • Let the batter rest for 5 minutes for a lighter crumb.
  • Taste the rhubarb sweetness before baking; adjust sugar if needed.

Professional Secrets

  • Room‑temperature butter incorporates air better, giving lift.
  • Sifting flour prevents lumps and ensures a uniform texture.
  • Baking on the middle rack promotes even browning.
Amelia Hart

Recipe by

Amelia Hart

Chef Amelia Hart is a dessert enthusiast who loves creating elegant cakes, cookies, and baked treats. Her baking style combines classic pastry techniq ...

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