Rating: 3.67
(12)

Keto Rhubarb Cake

June 16, 2025

If you’re living the keto lifestyle but still crave something sweet and seasonal, this Keto Rhubarb Cake is a must-try. With its moist texture, tangy-sweet flavor, and low-carb ingredients, this cake proves you can have your dessert—and stay in ketosis too.

Rhubarb, often overlooked, is a keto-friendly vegetable that shines in desserts thanks to its tart, fruity flavor. It’s naturally low in carbs and high in fiber, making it a perfect ingredient for low-sugar baking. When paired with almond flour, eggs, butter, and a keto-approved sweetener like erythritol or monk fruit, rhubarb transforms into a soft, luscious cake that’s just sweet enough to satisfy your cravings.

What makes this cake special is its balance of richness and brightness. The almond flour gives it a nutty, buttery base, while the rhubarb brings a punch of flavor and moisture. A touch of vanilla or lemon zest enhances the overall aroma, making each bite feel indulgent yet refreshing.

This keto rhubarb cake is incredibly versatile—you can bake it in a loaf pan, a round cake tin, or even as muffins for individual servings. It’s a fantastic option for spring and summer gatherings, whether you’re hosting brunch, celebrating a special occasion, or just treating yourself on a sunny afternoon. Top it with a dollop of sugar-free whipped cream or a drizzle of low-carb glaze for a little extra flair.

Best of all, this recipe is quick to make and stores well in the fridge, making it perfect for meal-prepping dessert for the week. With just a few simple ingredients and minimal effort, you can enjoy a guilt-free, gluten-free, and completely keto treat that even non-keto friends and family will love.

So, if you’re looking to celebrate rhubarb season the low-carb way, this Keto Rhubarb Cake is the perfect blend of comfort and freshness.

Keto Rhubarb Cake
Keto Rhubarb Cake
3.67 from 12 votes
A delicious and low-carb cake that combines the tartness of rhubarb with a sweet, fluffy batter. Perfect for those following a ketogenic diet.
Servings 1 people
Prep Time 20 minutes
Cook Time 40 minutes
Total Time 1 hour

Ingredients
  

  • 1 cup almond flour
  • 1/2 cup erythritol or preferred keto-friendly sweetener
  • 1/2 teaspoon baking powder
  • 1/4 teaspoon salt
  • 3 eggs large
  • 1/4 cup butter melted
  • 1 teaspoon vanilla extract
  • 1 cup rhubarb chopped

Instructions
 

  • Preheat the oven to 350°F (175°C). Grease a cake pan or line it with parchment paper.
  • In a bowl, mix together the almond flour, erythritol, baking powder, and salt.
  • In another bowl, beat the eggs, then add melted butter and vanilla extract, mixing until well combined.
  • Combine the wet and dry ingredients, mixing until fully incorporated.
  • Fold in the chopped rhubarb gently.
  • Pour the batter into the prepared cake pan and smooth the top with a spatula.
  • Bake for 40 minutes or until a toothpick inserted into the center comes out clean.
  • Allow the cake to cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.

Nutrition

Serving: 1gCalories: 190kcalCarbohydrates: 8gProtein: 6gFat: 16gSaturated Fat: 6gPolyunsaturated Fat: 1gMonounsaturated Fat: 8gCholesterol: 70mgSodium: 130mgPotassium: 120mgFiber: 4gSugar: 1gVitamin A: 350IUVitamin C: 3mgCalcium: 45mgIron: 1mg
Calories: 190kcal
Cuisine: American
Keyword: dessert, ketogenic, Low-Carb
Cooking Method: Baked
Diet: Low-carb
Time: >45 Min
Level: Easy
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Join the Conversation
  1. User avatar suzanna.jerde72 says:

    2 stars
    Why is rhubarb so tart? I didn’t like the taste much in this. My family loved it though.

    1. 2 stars
      I thought it was supposed to be sweet, not tart! Are you sure about the recipe? 🤔

    2. User avatar Deep Thought says:

      4 stars
      Rhubarb is supposed to be tart! It’s kinda what makes it unique. Maybe just add more sweetener next time?

  2. User avatar King Zora says:

    4 stars
    Tastes good but really needs more rhubarb. I added some blueberries too!

  3. 5 stars
    Simple and sweet, just right for my diet! Great to use almond flour!

  4. User avatar kina.fay79 says:

    3 stars
    Good recipe if you like keto stuff. I found it a bit dry, maybe I missed something?

  5. User avatar Marth Schiller says:

    5 stars
    This cake was amazing! So moist and flavorful! I can’t believe it’s keto!

    1. User avatar lois.bailey86 says:

      5 stars
      I’m so glad you liked it! It’s a game changer for keto desserts! 😊

    2. User avatar everett.feest80 says:

      2 stars
      I dunno, keto cake? Sounds weird to me. Is that even possible? 🤔

  6. User avatar yang.jenkins says:

    4 stars
    Followed this cake thing-it’s great! Can’t find rhubarb here, but still tryin!

    1. 5 stars
      Sounds delicious! You could try using strawberries or another fruit if rhubarb isn’t available. Good luck!

  7. User avatar shad.quitzon23 says:

    3 stars
    I’m skeptical about keto recipes. This one seemed too simple. Hope it’s not a flop.

3.67 from 12 votes
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