Icelandic Rhubarb Cake – Quick 25‑Minute Dessert

Fluffy, fruity, and ready in the time it takes to sip tea. Desserts & Baking .

Quick, airy rhubarb cake with a hint of citrus, ready in 25 minutes for a crowd‑pleasing dessert.

Published: April 29, 2026
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Icelandic Rhubarb Cake – Quick 25‑Minute Dessert | Delicious Recipes & Tips - Food Nity Food Blog
The rhubarb cake tradition stretches from the cool cliffs of Iceland to the green valleys of Scandinavia, where gardeners have long prized the tart stalks for their bright flavor. Historically, Icelandic bakers would fold thinly sliced rhubarb into a simple batter, letting the fruit’s natural juices soften the crumb. This heritage recipe, now modernized, still carries that same sense of place – a subtle nod to the northern winds and the warm hearths that keep families together. It’s neither overly sweet nor austere; it simply lets the fruit sing.

Why You'll Love It

  • - Ready in just 25 minutes, perfect for busy days
  • - Light and airy texture that feels like a cloud
  • - Bright rhubarb flavor balanced with a hint of lemon
  • - Simple pantry ingredients, no fancy equipment needed

*“The cake was so light that it practically melted on my tongue – a true spring delight!”*

Essential Ingredient Guide

  • Rhubarb stalks: Choose firm, deep‑red stalks; trim the ends and slice thin for even baking
  • All‑purpose flour: Sift to keep the crumb tender and prevent lumps
  • Buttermilk: Adds subtle tang and helps the cake stay moist
  • Vanilla extract: A small splash enhances the sweet‑sour harmony
  • Lemon zest: Introduces a bright citrus note that lifts the rhubarb
  • Sugar: Adjust to taste; the rhubarb already provides tartness
Preparing Icelandic Rhubarb Cake – Quick 25‑Minute Dessert | Delicious Recipes & Tips - Food Nity Food Blog

Complete Cooking Process

  • Ingredient Readiness:

    Trim and slice rhubarb, sift flour, and bring butter to room temperature.

  • Flavor Development:

    Cream butter and sugar, then fold in rhubarb and zest to release aromatic oils.

  • Texture Control:

    Gently stir in the dry ingredients and buttermilk, careful not to over‑mix.

  • Finishing Touches:

    Dust the batter with a pinch of flour before sliding into the hot oven.

  • Pro Tips

    • Use a light hand when folding to keep the cake airy
    • Pre‑heat the oven fully; sudden temperature changes affect rise
    • Cool the cake upside‑down on a rack for a softer crumb
    • Serve slightly warm with a dusting of powdered sugar

    Well, I find the little pauses matter. After the cake is out, let it rest for a few minutes – the steam inside keeps it tender. Then, a brief moment of slicing, feeling the delicate crumb, makes the whole effort worthwhile. It’s those quiet seconds that turn a simple dessert into a memory.

The essence of the dish:

A delicate balance of tart rhubarb and sweet batter, where each bite feels like spring breezing through a kitchen window.

A fun fact or historical angle:

In Iceland, rhubarb was once a winter staple, cultivated in heated greenhouses to survive the harsh climate.

Flavor or sensory focus:

You’ll notice the bright citrus zing, the soft crunch of cooked stalks, and the whisper of vanilla that lingers after each bite.

You Must Know

  • Do not over‑mix the batter
  • Use room‑temperature butter
  • Slice rhubarb thinly for even cooking

Frequently Asked Questions

→ Can I use frozen rhubarb?

Yes, thaw it first and pat dry; the texture will be slightly softer but still delicious.

→ What if I don’t have buttermilk?

Replace with regular milk plus a teaspoon of lemon juice; let sit for five minutes.

→ How long does the cake stay fresh?

Store in an airtight container at room temperature for up to three days.

→ Can I add nuts?

A handful of toasted almonds adds a pleasant crunch without overwhelming the rhubarb.

→ Is this recipe gluten‑free?

Swap the all‑purpose flour for a 1‑to‑1 gluten‑free blend; the texture remains light.

→ What’s a good topping?

A light dusting of powdered sugar or a drizzle of honey pairs beautifully.

Icelandic Rhubarb Cake – Quick 25‑Minute Dessert Ready to Serve | Delicious Recipes & Tips - Food Nity Food Blog

Chef's Tips

The batter is delicate; avoid over‑mixing to keep the crumb airy.,If the rhubarb releases a lot of juice, gently pat it dry before folding.,For extra brightness, add a splash of orange liqueur – oops, sorry, we’ll skip that for a kid‑friendly version.

Nutrition Facts

per serving

280

Calories

4g

Protein

42g

Carbs

9g

Fat

Fiber: 2g
Sugar: 22g
Sodium: 150mg

Taste Profile

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

Bright and lightly sweet with a pleasant tart finish

Ingredient Substitutions

Don't have an ingredient? Try these alternatives

Butter Margarine or coconut oil

May alter flavor slightly; choose a neutral oil for best results

Sugar Honey or maple syrup

Reduce liquid elsewhere if using liquid sweeteners

Recipe Variations

Try these delicious twists on the original

Spicy Version

Add a pinch of ground ginger and a drizzle of honey for warmth.

Mediterranean Style

Fold in chopped pistachios and a splash of orange blossom water.

Common Mistakes to Avoid

Learn from others' mistakes for perfect results

  • Over‑mixing the batter, which can make the cake dense.
  • Baking at too low a temperature; the cake may sink in the center.
  • Not drying excess rhubarb juice, leading to a soggy crumb.

Meal Prep & Storage

Make Ahead Tips

You can slice and chill the rhubarb a night before; the batter can be mixed up to 2 hours ahead and kept refrigerated.

Leftover Ideas

Reheat gently in a skillet with a splash of milk to restore moisture, or serve cold with a dollop of whipped cream.

Perfect Pairings

Serve this with...

A glass of chilled sparkling water with a twist of lemon Steamed jasmine rice for a savory contrast (if you’re feeling adventurous) Light cucumber salad dressed with dill

Cooking Timeline

0-5 min

Preheat oven, prepare pan, and gather all ingredients.

5-12 min

Cream butter and sugar, then add vanilla and lemon zest.

12-15 min

Fold in dry ingredients and buttermilk, followed by rhubarb.

15-20 min

Transfer batter to pan, smooth top, and bake.

20-25 min

Cool, unmold, and drizzle glaze if desired.

Icelandic Rhubarb Cake – Quick 25‑Minute Dessert

Icelandic Rhubarb Cake – Quick 25‑Minute Dessert

A light, fluffy Icelandic rhubarb cake that comes together in just 25 minutes, perfect for a quick spring treat that feels both homely and celebratory.

Author: Amelia Hart

Timing

Prep Time

15 Minutes

Cook Time

20 Minutes

Total Time

35 Minutes

Recipe Details

Category: Desserts & Baking
Difficulty: Easy
Cuisine: Icelandic
Yield: 8 Servings Servings
Dietary: Vegetarian

Ingredients

Main Ingredients

  • 01 1 ½ cups all‑purpose flour
  • 02 1 cup granulated sugar
  • 03 ½ cup unsalted butter, softened
  • 04 ¾ cup buttermilk
  • 05 2 cups fresh rhubarb, trimmed and sliced
  • 06 2 tsp baking powder
  • 07 ¼ tsp salt
  • 08 1 tsp vanilla extract
  • 09 Zest of 1 lemon

For the Glaze (optional)

  • 01 ½ cup powdered sugar
  • 02 2 tsp lemon juice

Instructions

Step 01

Preheat the oven to 350°F (175°C). Grease a 9‑inch round cake pan and line the bottom with parchment.

Step 02

In a bowl, whisk together flour, baking powder, and salt; set aside.

Step 03

Cream the softened butter with sugar until pale and fluffy, then stir in vanilla and lemon zest.

Step 04

Add the dry ingredients alternately with buttermilk, mixing gently. Fold in the sliced rhubarb just until incorporated.

Step 05

Pour the batter into the prepared pan, smoothing the top. Bake for 20‑22 minutes, or until a toothpick comes out clean.

Step 06

Let the cake cool in the pan for 10 minutes, then turn out onto a wire rack. If desired, drizzle the lemon glaze over the warm cake.

Notes & Tips

  • 1 The batter is delicate; avoid over‑mixing to keep the crumb airy.
  • 2 If the rhubarb releases a lot of juice, gently pat it dry before folding.
  • 3 For extra brightness, add a splash of orange liqueur – oops, sorry, we’ll skip that for a kid‑friendly version.

Tools You'll Need

  • 9‑inch round cake pan

  • Mixing bowls

  • Hand mixer or whisk

  • Rubber spatula

  • Wire cooling rack

  • Zester

Must-Know Tips

  • Don’t over‑mix the batter, gentle folds keep it light.
  • Room‑temperature butter blends evenly, preventing lumps.
  • Taste the batter before baking; adjust sugar if rhubarb is very tart.

Professional Secrets

  • Sift flour with baking powder for an even lift.
  • Cream butter and sugar slowly; this incorporates air.
  • Cool the cake upside‑down to maintain a soft crumb.
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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