Keto Blueberry Crumb Loaf (Gluten Free)

A moist and delicious coffee cake loaf baked with fresh blueberries and a cinnamon streusel crumb topping!

Blueberry Crumb Loaf – Keto, Low Carb & Gluten Free

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I take coffee crumb cake to the next level,  add fresh blueberries and make it into a loaf.  One of my favorite things in the world is a crumb topping!  I could literally pick it off and just eat that, honestly!  

I’ve been baking things with crumb topping for years, but since Keto, I’ve had to get creative in what I use in place of flour and brown sugar.  

Blueberry Crumb Loaf on cutting board with lemons in background

Enter Brown Swerve!  If you’ve never tried it, it’s fantastic! It looks, tastes and bakes exactly like brown sugar and is just perfect in this topping!

The texture of this blueberry loaf is absolutely perfect, thanks to the Oat Fiber that I use.  It adds a very cake-like texture without adding carbs, just plenty of fiber! But, please be aware, brands do matter with Oat Fiber.  

Blueberry Crumb Loaf on cutting board

I use Lifesource Oat Fiber, which I purchase on Amazon, it’s incredibly mild in flavor and ground to a very fine powder.  There are other brands of oat fiber out there that have a stronger flavor, so if you don’t buy Lifesource, be sure to read the customer reviews first!

What’s in Keto Blueberry Loaf

*Exact measurements are listed in the recipe card below.

How to Make Low Carb Blueberry Crumb Loaf

Preheat oven to 325F.

Blueberry Crumb Loaf - Keto, Low Carb & Gluten Free

Add all the ingredients for the crumb topping to a bowl, except the butter and mix together.

Blueberry Crumb Loaf - Keto, Low Carb & Gluten Free

Pour in the melted butter and mix until combined, then set aside.

Blueberry Crumb Loaf - Keto, Low Carb & Gluten Free

Add the flour, baking powder, oat fiber and salt to a bowl and whisk together, then set aside.

Blueberry Crumb Loaf - Keto, Low Carb & Gluten Free

Then add all the remaining ingredients, except the blueberries, to a large mixing bowl and mix using a hand mixer for about 30 seconds.

Blueberry Crumb Loaf - Keto, Low Carb & Gluten Free

Add in the dry ingredients and continue mixing.

Blueberry Crumb Loaf - Keto, Low Carb & Gluten Free

Fold in the blueberries gently, then pour into a 9″ x 5″ nonstick loaf pan that’s been sprayed with nonstick spray (I used coconut oil spray).  

If your pan isn’t nonstick, I would line it with parchment paper.  Smooth the top using your spatula and top with the reserved crumb topping.

Blueberry Crumb Loaf - Keto, Low Carb & Gluten Free

Bake for 45-50 minutes or until a toothpick, when inserted, comes out clean.

Can I Freeze Blueberry Crumb Cake?

You sure can! In fact, if you’re in a baking mood and would like to make a couple of these Keto coffee cakes, you can freeze them and have a grab and go snack anytime you’d like.

To properly freeze it and for optimal freshness, allow the crumb cake to completely cool. Slice into the portion sizes you’d like and double wrap it in plastic wrap for up to a couple of months. Alternately, you can freeze the unsliced loaf the same way, if you choose.

Blueberry Crumb Loaf - Keto, Low Carb & Gluten Free

What are the Carbs in Blueberries?

There are 17 net carbs in one cup of blueberries, but this blueberry crumb cake recipe only uses 2/3 cup which is split amongst 12 servings. That’s under 1.5 carbs per serving!

Blueberry Crumb Loaf - Keto, Low Carb & Gluten Free

What is Oat Fiber? Is Oat Fiber Keto?

Oat Fiber is made from grinding the outer husks of oats. How healthy is oat fiber? It’s pure insoluble fiber, which doesn’t dissolve in water and isn’t broken down in the digestive tract, so it has zero net carbs and is perfect for a Keto Diet. It helps give a more traditional texture and that’s why I use it so often. Check out all the Keto Oat Fiber Recipes you can make!

What is a Substitute for Oat Fiber?

To get the best results, it’s best to use oat fiber if you can. If you’re unable to find it, try a combination of psyllium husk powder and coconut flour. Since both are very absorbent, you might have to add more liquid.

Blueberry Crumb Loaf - Keto, Low Carb & Gluten Free

More Keto Blueberry Recipes

If you love this Blueberry Crumb Cake, you may be interested in trying some of these delicious low carb blueberry recipes:

PIN blueberry crumb loaf

If you’d like to know more about baking on Keto, this article, Keto Baking Made Easy, is loaded with tips and info that you’ll find helpful. You might also check out my Keto Sweet Treats eBook that has 50 amazing Keto dessert recipes, all with color pics, macros and more! I’m offering it at 50% off when you subscribe to my free weekly emails here.

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Blueberry Crumb Loaf on cutting board with lemons in background

Keto Blueberry Crumb Loaf (Gluten Free)

A moist and delicious coffee cake loaf baked with fresh blueberries and a cinnamon streusel crumb topping!
5 from 6 votes
Author: Julianne
Servings 12
PREP 10 minutes
COOK 45 minutes
TOTAL 55 minutes

RECIPE VIDEO

Ingredients
 

For the Loaf

For the Crumb Topping

Instructions
 

  • Preheat oven to 325F.
  • Add all the ingredients for the crumb topping to a bowl, except the butter and mix together.  Pour in the melted butter and mix until combined, then set aside.
  • Add the flour, baking powder, oat fiber and salt to a bowl and whisk together, then set aside.
  • Then add all the remaining ingredients, except the blueberries, to a large mixing bowl and mix using a hand mixer for about 30 seconds.  Add in the dry ingredients and continue mixing.
  • Fold in the blueberries gently, then pour into a 9" x 5" nonstick loaf pan that's been sprayed with nonstick spray (I used coconut oil spray).  If your pan isn't nonstick, I would line it with parchment paper.  Smooth the top using your spatula and top with the reserved crumb topping.
  • Bake for 45-50 minutes or until a toothpick, when inserted, comes out clean.

Recipe Notes

Oat Fiber is made from grinding the outer husks of oats. How healthy is oat fiber? It’s pure insoluble fiber, which doesn’t dissolve in water and isn’t broken down in the digestive tract, so it has zero net carbs and is perfect for a Keto Diet. It helps give a more traditional texture and that’s why I use it so often. Check out all the Keto Oat Fiber Recipes you can make!
To get the best results, it’s best to use oat fiber if you can. If you’re unable to find it, try a combination of psyllium husk powder and coconut flour. Since both are very absorbent, you might have to add more liquid.

*Make sure to scroll up and read the post for substitutions, additions and helpful tips for making this recipe.

Course Breakfast
Cuisine American
Calories 211kcal
Nutrition Facts
Keto Blueberry Crumb Loaf (Gluten Free)
Amount per Serving
Calories
211
% Daily Value*
Fat
 
16
g
25
%
Saturated Fat
 
5
g
31
%
Carbohydrates
 
10
g
3
%
Fiber
 
4
g
17
%
Sugar
 
2
g
2
%
Protein
 
8
g
16
%
* Percent Daily Values are based on a 2000 calorie diet.

*Nutritional data is provided as a courtesy and is accurate to the best of my knowledge. You can verify it using the nutrition calculator of your choice. All data is based on net carbs, without sugar alcohol: Swerve, Erythritol, Monk Fruit or Allulose.

© Copyright for Keto Cooking Christian LLC. Please use the share buttons to share on social media, but please do not copy/paste the recipe.

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Bible verse of the day

Blessed are you when people hate you, when they exclude you and insult you and reject your name as evil, because of the Son of Man.
5 from 6 votes

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Recipe Rating




28 Comments

  1. 5 stars
    This is a delicious cake. One of the best keto desserts I have made. Just one observation – I used an 8 x 4 loaf pan instead of the 9 x 5 size you recommended. It took an extra 15 minutes to cook through to the centre of the loaf. Next time I may just try it in a square cake pan to shorten the cooking time. Thanks for all your wonderful recipes!

  2. Hi,
    I was just wondering how to adjust baking time/temperature if I were to do this in a 8×8 or 9×9, as I do not have a loaf pan!

    Thanks!

  3. Is this really 6 net carbs per serving? The loaf is 12 servings so that would be a very small amount for the amount of carbs. Am I reading that right?

  4. 5 stars
    Hi this is a very good recipe
    i used 2T psyllium husk and 4T coconut flour as I had no oat fiber.
    used pecan meal and golden swerve.
    covered my frozen blueberries with coconut flour before adding them.
    would make it again

  5. 5 stars
    This cake is so good! I didn’t have heavy cream so just used additional sour cream, along with powdered monk fruit instead of Swerve Confectioners for the sweetener . And I used hazelnuts in the crumb topping because I have an allergy to walnuts. So yummy.

    I appreciate the time you have spent developing recipes that many probably don’t have time to do so that lots of us can enjoy healthier options!

    1. I’ve honestly never tried that before, so I can’t say how it might turn out. Psyllium Husk powder and a little coconut flour might be a better substitute, but Oat Fiber still really works best.

  6. Is there anything I can use without oat fiber? I don’t have money at the moment to order any. Tnx

  7. 5 stars
    Made this for a family get together, because I have a lot of family on Keto as well. Big hit and easy to make! Plus it displays very pretty 🙂 My husband said “how in the world is this keto”??? Lol. Thanks for the great recipe ❤️

    1. Hi Loren,
      Nice to hear that this was a hit with your family! Glad everyone enjoyed it 🙂

      1. Hi Kayla,
        There really isn’t anything that will work as well, but you can maybe try a combination of psyllium husk powder and coconut flour. You might need to add a little more liquid as well.

  8. Could I use psyllium husk instead?

    Love your site! I am a believer myself and so thankful for sisters in Christ to fellowship with in this sweet way.

    1. Hi Ana,
      I’m glad to hear you’re a believer as well and that you like the site 🙂 I can’t say how psyllium husk powder would work to be honest, because I haven’t tried it. I would try to use the oat fiber if possible, it’s really what gives this loaf such great texture.

  9. This looks really yummy, but I live in Australia and I haven’t been able to find Swerve Brown Sugar. Is there a way around this!

    I love today’s verse too. Last week an uncle of mine who lives in Virginia was buried. My comfort is in knowing he is now with our Saviour in heaven and I will see him when I get there.

    1. Hi Marji,
      I’m so sorry to hear about your uncle! But as you said, you can rest knowing he is with our Lord and in a much better place than we are. You will get to spend eternity with him and our Lord, what a comfort indeed! On the brown swerve, I’m not sure if granular would work instead, because I’ve never tried it. If there is another brown sugar substitute that is available to you there, that should work. Like brown sugar, it gives it a molasses sort of flavor and texture that’s different from regular erythritol. I’m not sure what else you could try honestly, possibly a tiny bit (1/2 teaspoon maybe) of blackstrap molasses and a few drops of maple extract?