Published: Oct 3, 2024 by Carolyn

Keto Fudge Crumb Bars

Name: Keto Fudge Crumb Bars
Prep time: 25 min
Cook time: 35 min
Total time: 70 min
Ingredients: 2 cups almond flour; 1/2 cup Swerve Sweetener; 2 tbsp coconut flour; 1/4 tsp salt; 6 tbsp butter (melted); 1 tsp vanilla extract; 3/4 cup whipping cream; 1/3 cup powdered Swerve Sweetener; 3 ounces unsweetened chocolate (finely chopped); 1/2 tsp vanilla extract; 1/4 tsp glucomannan ((or xanthan gum))

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These keto chocolate fudge crumb bars are my healthy answer to an old Starbucks favorite. With less than 3g net carbs per serving, it’s a delicious sugar-free dessert you won’t want to miss!

Close up shot of a stack of Keto Fudge Crumb Bars on a white table.

I used to be such a Starbucks aficionado. It’s funny but I don’t go at all anymore unless I am traveling somewhere and in desperate need of a cuppa joe. I much prefer to make my own coffee and specialty drinks at home. Or maybe I have just become THAT anti-social.

I do have fond memories of their old baked goods, back when quality mattered to them. And I have created any number of low carb copycat recipes, like Keto Maple Pecan Scones and Keto Frappuccinos.

To be honest, my healthier versions are just as good as, or possibly even better than, the originals. And these Keto Fudge Crumb Bars are no exception!

Keto Fudge Crumb Bars piled up on a wooden cutting board with a jar of chocolate chips in the background.

Why this recipe rocks!

I really used to love the oatmeal fudge bars, with a delicious crumbly crust and rich chocolate filling. So how does one replicate that same crumbly, buttery crust in a low carb way?

You will be happy to hear that it’s not that hard. Done correctly, almond flour makes a great crumb crust for keto baked goods. It really comes down to the right ratio of almond flour, sweetener, and butter. I always like to add in a bit of coconut flour too, to dry out the mixture. I’ve used similar crusts in recipes like Keto Caramel Butter Bars and Keto Pumpkin Coffee Cake.

The filling is a simple keto chocolate ganache with a little added thickener. It’s like chocolate sauce when you pour it over but it becomes a thick, delicious fudgy layer as it bakes. The end result is spectacularly delicious!

Reader Reviews

“These were absolutely AMAZING!! I can’t believe they are low carb. No one would ever suspect. The only thing I did differently was add extra sweetener because the chocolate was pretty bitter and I’m not a fan of extra bitter chocolate. Thank you once again, Carolyn, for a marvelous dessert!” — Nancy

“OK it doesn’t get any better than this – quick and simple recipe, easy to throw together in a jiffy and tastes great! This one is a home run. This was a hit with everyone – keto, gluten free or people with no dietary restrictions. Everyone LOVES these bars. I have already been asked to bring these to the next family gathering. Thank you for an AMAZING recipe!!!” — Joyce

“Made this recipe over the weekend & delighted how easy to make!! Definitely another winner!! I was amazed how the chocolate ganache turned out. Thank you for sharing this fudgy delight with us!!! Your baking tips & videos are great & so beneficial for successful outcomes!!” — Diana

Ingredients You Need

Top down image of ingredients needed for Keto Fudge Crumb Bars.

Almond flour: You really do need to use a good finely ground almond flour for this recipe.
Sweetener: Erythritol based sweeteners will give you the best results for the crust. But you can use other sweeteners in the filling. See the Tips for Success for more information.
Coconut flour: A little coconut flour gives the cake a lighter, fluffier consistency. It also helps cut down in fat and calories!
Butter: For a dairy free option you can swap it out for coconut oil or palm shortening.
Heavy whipping cream: A good chocolate ganache always starts with heavy cream!
Unsweetened chocolate: Do note that this is completely unsweetened chocolate, meaning it doesn’t contain any sweeteners at all. I recommend getting a good brand like Guittard or Ghirardelli, as they are less likely to seize.
Glucomannan: This helps the fudge filling thicken. You can also use xanthan gum.
Pantry staples: Vanilla extract and salt.

Step by Step Directions

A collage of 6 images showing how to make Keto Fudge Crumb Bars.

1. Make the crumb crust: In a large bowl, whisk together the almond flour, sweetener, coconut flour, and salt. Stir in the butter and vanilla extract and toss until mixture resembles coarse crumbs.

2. Bake the bottom crust: Press ⅔ of the mixture firmly into bottom a greased 8×8 baking pan. Bake at 325ºF for 8 minutes, until just golden on the edges and then remove (it will not be baked through).

3. Prepare the fudge filling: In a large saucepan, heat the whipping cream and powdered sweetener over medium heat, stirring to combine. Bring to barely a simmer and remove from heat. Add the chopped chocolate and let sit 5 minutes to melt.

4. Pour over the crust: Whisk filling until smooth, then add the vanilla. Sprinkle with glucomannan and whisk to combine. Pour the filling over the crust and spread to the edges.

5. Bake the bars: Sprinkle the surface with the remaining crumb mixture. Bake 22 to 25 minutes, until the topping is golden brown. Remove and let cool completely.

Three Keto Fudge Crumb Bars on a white plate over a gauzy blue napkin.

Tips for Success

You want the crust mixture to resemble coarse crumbs, so if it’s too soft, add a little more almond or coconut flour to help thicken it.

Unsweetened chocolate makes a better fudge filling because it thickens up better than sugar-free brands like Lily’s or ChocZero. You can use these if you like but your filling may be a little too soft.

Sweetener Options

An erythritol based sweetener is your best bet for the crust in this recipe. Allulose sweeteners will make it too soft and hard to pick up. If you want to cut back on the erythritol, try using only ⅓ cup and adding a little stevia extract to make it sweeter.

The filling should work with both erythritol and allulose, although it may take longer to firm up properly with allulose. Make sure you use a powdered sweetener. I don’t recommend stevia extract here, as it can be very bitter when directly combined with chocolate.

Close up shot of Keto Fudge Crumb Bars piled up with a bite taken out of the top one.

Frequently Asked Questions

How to you make crumb bars with keto ingredients?

You can make a wonderful crumb crust with almond flour, coconut flour, sweetener and butter. It’s great on everything from keto coffee cake muffins to Keto Strawberry Rhubarb Crumb Bars.

How do I store leftover keto fudge crumb bars?

These crumb bars will be good on the counter for up to 5 days, as long as you are not in a hot area. Otherwise, keep them in the refrigerator for up to 2 weeks. You can also freeze these bars. Wrap them up tightly and store in a freezer safe container for several months.

How many carbs are in Keto Fudge Crumb Bars?

This keto fudge crumb bar recipe has 5.4g of carbs and 2.7g of fiber per serving. That comes to 2.7g net carbs per bar.

Keto Fudge Crumb Bars

These keto chocolate fudge crumb bars are my healthy answer to an old Starbucks favorite. With less than 3g net carbs per serving, it's a delicious sugar-free dessert you won't want to miss!

5 from 26 votes

Print Pin Rate

Course: Dessert

Cuisine: Dessert

Keyword: crumb bars, keto fudge bars

Prep Time: 25

Cook Time: 35

Total Time: 1 10

Servings: bars

Calories: 198kcal

Ingredients

Crust:

2 cups almond flour
½ cup Swerve Sweetener
2 tablespoon coconut flour
¼ teaspoon salt
6 tablespoon butter melted
1 teaspoon vanilla extract

Filling:

¾ cup whipping cream
⅓ cup powdered Swerve Sweetener
3 ounces unsweetened chocolate finely chopped
½ teaspoon vanilla extract
¼ teaspoon glucomannan (or xanthan gum)

US Customary – Metric

Instructions

Preheat the oven to 325ºF and grease an 8×8 inch metal baking pan.
In a large bowl, whisk together the almond flour, sweetener, coconut flour, and salt. Stir in the butter and vanilla extract and toss until mixture resembles coarse crumbs.
Press ⅔ of the mixture firmly into bottom prepared baking pan. Bake 8 minutes, until just golden on the edges and then remove (it will not be baked through).
In a large saucepan, heat the whipping cream and powdered sweetener over medium heat, stirring to combine. Bring to barely a simmer and remove from heat. Add the chopped chocolate and let sit 5 minutes to melt.
Whisk filling until smooth, then add the vanilla. Sprinkle with glucomannan and whisk to combine. Pour the filling over the crust and spread to the edges.
Sprinkle the surface with the remaining crumb mixture. Bake 22 to 25 minutes, until topping is golden brown. Remove and let cool completely.

Video

Nutrition Facts

Keto Fudge Crumb Bars

Amount Per Serving (1 bar)

Calories 198 Calories from Fat 159

% Daily Value*

Fat 17.7g27%

Sodium 82mg3%

Carbohydrates 5.4g2%

Fiber 2.7g11%

Protein 4.2g8%

* Percent Daily Values are based on a 2000 calorie diet.

Please note that I am not a medical or nutritional professional. I am simply recounting and sharing my own experiences on this blog. Nothing I express here should be taken as medical advice and you should consult with your doctor before starting any diet or exercise program. I provide nutritional information for my recipes simply as a courtesy to my readers. It is calculated using MacGourmet software and I remove erythritol from the final carb count and net carb count, as it does not affect my own blood glucose levels. I do my best to be as accurate as possible but you should independently calculate nutritional information on your own before relying on them. I expressly disclaim any and all liability of any kind with respect to any act or omission wholly or in part in reliance on anything contained in this website.

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Comments

5 from 26 votes (4 ratings without comment)

Keto Fudge Crumb Bars

Why this recipe rocks!

Reader Reviews

Ingredients You Need

Step by Step Directions