The Best Keto Fudge Brownies

Stack of fudgy keto brownies dusted with powdered sweetener
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Introduction

Soft, moist, and fudgy brownies are everyone’s favorite, and they’re hard to come by while on keto. These are dense and properly chocolatey, with a dash of cold brew coffee in the batter that pushes the cocoa deeper without tasting of coffee at all. They remind me of our fudge keto cookies, Low Carb Double Chocolate Chip Fudge Cookies!

A lot of keto brownies come out either too soggy or so cocoa-heavy they turn bitter. These land between the two: almond flour for the body, enough cocoa to be dark without being harsh, and sugar-free chips folded through so there are still melted pockets in a finished square.

To Make This Recipe, You’ll Need These Must-Haves:

Butter

It is important to use softened butter for this recipe to ensure that it mixes easily with the other ingredients. If your butter is too hard, it may be challenging to incorporate it into the batter. You can soften butter by leaving it at room temperature for a few hours or microwaving it in short bursts until it becomes soft.

Lakanto Powdered Sweetener

This is a low-carb, sugar-free sweetener from monk fruit extract and erythritol. We used this to sweeten the batter and to dust the brownies after we baked them.

Lakanto Golden Sweetener

We added this to give the keto fudge brownies a deeper, caramel-like flavor. Lakanto Golden Sweetener is a low-carb, sugar-free sweetener made from monk fruit extract and erythritol. It is designed to be a low-carb, sugar-free alternative to brown sugar and has a similar taste and texture. It is not toasted and does not have the same toasty, caramel-like flavor as regular brown sugar. That said, for keto or low-carb recipes, Lakanto Golden Sweetener will work well in place of regular brown sugar.

Eggs

The eggs in this recipe help to bind the ingredients together and give the brownies structure. When using eggs in baking, it is essential to keep the following things in mind:

  • Room temperature: It is best to use room temperature eggs in baking as they are easier to mix into the batter and tend to produce a more consistent result. If you forget to take your eggs out of the fridge in advance, you can place them in a bowl of warm water for a few minutes to bring them to room temperature.
  • Size: This recipe is written for two large eggs, which is the standard most recipes assume. If all you have is extra-large, the batter will be a little wetter and the brownies a little denser. There is no reduced quantity given for them — the times below are written for large.

Cake Batter Flavor

Adding flavoring gives these fudgy keto brownies a fun, birthday cake-like taste. You can find cake batter flavoring at just about all grocery stores (near the vanilla extract), or you can find it on Amazon. For this particular recipe, we used this particular one.

Almond Flour

Almond flour is a staple in almost all keto baked goods, and these fudgy keto brownies are no exception. Almond flour works for these brownies because Coconut flour can absorb wet ingredients a tad too well and, at times, leave your baked good with a grainy/crumbly texture. Since we were going for a moist and fudgy, we opted to use Almond flour. Coconut flour is not a substitution here: it absorbs far more liquid, so changing the flour means rebalancing the eggs and the coffee too, which makes it a different recipe rather than a swap.

Unsweetened Cocoa Powder

Cocoa Powder is a crucial ingredient that gives the brownies chocolate flavor. Make sure to use unsweetened cocoa powder to keep the recipe low in carbs. Which cocoa powder you use is entirely up to your preference. We do love the Hershey’s brand, though!

Cold Brew Coffee

You need coffee, as it is the secret ingredient in these fudgy keto brownies. It adds depth and richness to the chocolate flavor of the brownies. Even if you don’t have cold brew coffee, you can use regular coffee or water as a substitute. While you may not be a coffee fan, I would not worry too much as the taste does not even come out in the final product. Think of the coffee as an amplifier to the chocolate flavor, not the brownie’s actual flavor. We took the easy way out and bought some cold brew at the store, but making it at home is super easy. If you brew some coffee at home and refrigerate it for a few hours, you will be good to go!

Sugar-Free Chocolate Chips

These are what make a bite of brownie go properly chocolatey rather than just cocoa-bitter. The recipe is written around Lakanto’s sugar-free semi-sweet chips, which is what the card calls for and what the nutrition panel is calculated from.

Any sugar-free chip or chopped sugar-free chocolate will work in their place — check the label, since the carb count varies a lot between brands and some use maltitol, which not everyone gets on with.

Storage and Freezing Instructions

Storing: Keep them at room temperature in an airtight container rather than the fridge, where they dry out noticeably faster and lose the soft, chewy texture that is the point of them. No keeping window is given here.

Freezing: Yes, you can technically freeze brownies. If you make a batch you did not finish, wrap them in plastic wrap and pop them in the freezer. When you are ready to eat them, let them thaw out while still wrapped at room temperature.

Frequently Asked Questions

Can I Skip The Xanthan Gum in the Recipe?

We would not. Xanthan gum is the thickener doing the chewy, fudgy part of the texture here, and the recipe is written around it. No version without it, or with ground flaxseed in its place, is given here, so there is nothing we can tell you about how either one turns out — if you try, let us know how it goes in the comments.

What Sweetener Should I Use To make the Perfect Keto fudge brownies?

Not all sweeteners are created equal. We used Lakanto’s monk fruit for this recipe — of the ones we have baked with, it is the one that tastes most like sugar to us, and we don’t get an aftertaste from it. You know what I mean if you have used Splenda or stevia. It is a blend built to measure 1:1 with sugar, so the amount in the card is the amount a regular brownie recipe would use.

Wrap Up

Have you tried this recipe or any other recipe on the blog? Please rate it below and let us know your thoughts in the comments! We love hearing from you!

You can also share it on Instagram and use the hashtag #buttertogetherkitchen, and we may feature your creation on our social media.

Enjoy!

Best Fudgy Keto Brownies

Prep Time
10 minutes
Cook Time
55 minutes
Total Time
1 hour 5 minutes
Yield
12 brownies
Course
Dessert
Cuisine
American

Ingredients

All Ingredients

Nutrition Facts

12 servings per recipe
Trans Fat 0g 0% 0g 0%
Total Sugars — —
Allulose 0g 0% 0g 0%

Where you see an em dash: one of the ingredients in this recipe does not publish a figure for that row, so we cannot add one up honestly. We would rather show you nothing there than a zero we cannot stand behind.

About these numbers: We are home cooks, not certified nutritionists. Nutrition is shared as a courtesy. We pick a representative product for each ingredient, and our recipe system works out the totals from the amounts in this recipe, so please treat them as a helpful estimate rather than a guarantee. The brands you buy, any swaps you make, and how generously you portion the recipe will all move these numbers.

Directions

  1. Preheat oven to 350 degrees. Line an 8x8 inch pan with parchment paper or grease with butter.

  2. In a medium mixing bowl, whisk together the softened butter and sweeteners until creamy.

  3. Whisk in eggs and cake batter flavoring.

  4. Add in almond flour, unsweetened cocoa powder, baking powder, and xanthan gum. Mix in well.

  5. Slowly add in the cold brew coffee until fully incorporated.

  6. Fold in chocolate chips.

  7. Bake brownies for 55-60 minutes. Allow brownies to set for about 30 minutes before cutting and serving. Enjoy!

    The edges should be set, and a toothpick pushed into the center should come out with moist crumbs on it rather than wet batter. Test somewhere between the chocolate chips — straight through a melted one tells you nothing.

Notes

Sweetener Combo: Lakanto Powdered Sweetener works best in this keto brownie recipe, but granular will work well too. Whether you use powdered sweetener or granulated, consider adding in some Lakanto Golden Monk Fruit. There is something about adding in the golden sweetener (a brown sugar substitute) that makes these brownies better. However, if you don’t have the golden sweetener, use one full cup of powdered sweetener.

Pan Size: If you like thicker brownies, an 8x8 pan is probably best for this recipe. If you prefer thinner brownies that may be a little crispier around the edges, go with a 9x9 pan. Either way, these brownies will turn out awesome!

Extra Chocolate Chips: If you’re a chocolate lover, sprinkle some additional as this will make them more visually appealing and, most importantly, extra chocolaty!

Don’t Overbake: Are you a cake brownie person or a fudge brownie person? If you are like me and like your brownies a bit more on the fudgy side, don’t overbake your brownies, and you will get a fudge-like center. If you are not about that fudge, add 5-10 minutes to the baking time.

Cool Completely: The most tempting thing in the world is to eat baked goods as soon as they come out of the oven. Resist the temptation, and let these keto brownies cool before you dig in. Having this setup time will give your brownies time to become more solid. So, drop that knife, walk away from the counter, and trust the process by giving it a few minutes.

Cutting: If you like things nice and neat, cut your brownies in a straight-down motion instead of a seesaw motion. If you go crazy on your brownies, they will crumble in fear. Ok, not really, but they will get messy.

Updated — October 5, 2026: The recipe card now tells you how a finished brownie looks and feels at the end of the bake, instead of leaving you with only a timer.

Correction — September 15, 2026: The sweetener section now attributes measuring 1:1 with sugar, and the absence of an aftertaste, to the particular blend rather than to monk fruit. Bare monk fruit extract is far sweeter and does not swap cup for cup.