Easy Air Fryer Keto Brownies

Air fryer keto brownie in a pale blue ramekin under a scoop of ice cream, on a woven mat beside a floral cloth
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Introduction

If you’ve been around the blog, you probably know that chocolate is my ultimate weakness. There aren’t many things better than a rich, chocolatey brownie — warm, and preferably with something cold on top of it.

These air fryer keto brownies use eight ingredients and bake in two ramekins. The batter combines almond flour and cocoa powder with chopped pecans and sugar-free baking chips for a fudgy brownie with a little crunch.

Why Make Brownies in an Air Fryer?

The air fryer is useful when you want two individual brownies without heating a full-size oven. Preheating it to 350°F allows the ramekins to begin baking as soon as they go into the basket. When you want a full pan instead, our fudgy keto brownies are an oven-baked option.

Air fryers vary in shape and heating-element placement. Set the ramekins as far from the heat source as your basket safely allows, and use ramekins that the manufacturer identifies as oven-safe.

Key Ingredients

Almond flour supplies the base of the batter, while unsweetened cocoa powder provides the chocolate flavor. Powdered monk fruit sweetener blends into the batter without adding granulated sugar.

Melted butter and one egg bring the batter together. Chopped pecans add texture, and ChocZero baking chips add pockets of chocolate.

How to Make Air Fryer Brownies

The batter comes together in one bowl, and the recipe card below has it step by step. What is worth knowing ahead of time comes down to the ramekins and the wait at the end.

The ramekins are standing in for the pan, so grease them well, and split the batter evenly between the two — they share the same 10 minutes in the basket, and two unequal depths will not finish together. The ramekin size this recipe was written around is not recorded, so if yours are deeper or wider than a single-serving dish, treat the 10 minutes as a starting point and go by the edges and the center instead.

Then leave the brownies alone for 5 minutes once they come out. They are still setting at that point, so the rest is part of the recipe rather than a nice-to-have.

Easy Air Fryer Keto Brownies

5 net carbs
Prep Time
10 minutes
Cook Time
10 minutes
Total Time
25 minutes Includes 5 minutes resting
Yield
2 brownies
Course
Dessert
Cuisine
American

Ingredients

Nutrition Facts

2 servings per recipe
Trans Fat 0g 0% 0g 0%
Allulose 0g 0% 0g 0%

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 the air fryer

    Preheat the air fryer to 350°F.

  2. Mix the dry ingredients

    Combine the almond flour, baking powder, cocoa powder, and powdered monk fruit sweetener in a large mixing bowl.

  3. Add the egg and butter

    Add the egg and melted butter. Beat with a hand mixer or whisk until the batter is evenly combined.

  5. Stir in the pecans and baking chips

    Fold in the chopped pecans and ChocZero baking chips until evenly distributed.

  6. Fill the ramekins

    Divide the batter between two well-greased, oven-safe ramekins.

  7. Air fry the brownies

    Place the ramekins in the air fryer, as far from the heat source as the basket safely allows. Bake for 10 minutes.

    They are done when the edges are set and risen and the center is still soft to a light press — a toothpick pushed into the middle should come out with moist crumbs on it, not wet batter. Air fryers and ramekin depths both vary, so the 10 minutes is a starting point and this is the endpoint.

  8. Rest before serving

    Let the brownies rest for 5 minutes so they can set before serving.

Notes

Tools and Equipment

  • Two oven-safe ramekins. The batter is portioned between them, so the pair is what makes this two brownies rather than one.

Preparation Notes

Preheat the air fryer and grease the ramekins well before adding the batter. Confirm that the ramekins are rated for oven use.

The capacity of the ramekins is not part of this recipe’s record, so fill both to the same depth and judge the bake by the endpoint in the step above rather than by the clock. Two dishes filled to different depths will not finish at the same time.

Storage

Keep leftover brownies covered in the refrigerator. They are best the day they are baked, while the centers are still fudgy; from cold, warm one through until the center is soft again rather than until it is hot, which dries out the edges. No keeping window is given here.

Serving Suggestions

Serve the brownies warm on their own, or add powdered sweetener, extra pecans, keto-friendly whipped cream, or a sugar-free sauce. A scoop of our keto vanilla ice cream or homemade almond milk ice cream works too, and so does a drizzle of ChocZero syrup.

Frequently Asked Questions

Why use an air fryer for this brownie recipe?

The air fryer bakes two individual brownies without requiring a full-size oven. Preheat it to 350°F and place the oven-safe ramekins as far from the heating element as the basket safely allows.

What chocolate should I use for these air fryer brownies?

The recipe was written with ChocZero baking chips. If you use another product, check its label and remember that different chips can melt and sweeten differently.

Can I use a different sweetener instead of Lakanto powdered monk fruit sweetener?

Use another powdered sweetener rather than a granulated one — three tablespoons of powdered dissolves into a small batter where the same volume of granules can stay gritty. Beyond the form, sweeteners differ in how sweet they are by volume, so start under the three tablespoons and taste the batter. No equal-volume amount for another product is given here.

Can I bake these brownies in a conventional oven?

Not from these instructions. The ten minutes here is written for two small ramekins in a basket with the heat close to them, and an oven needs its own pan, temperature and time — no oven conversion for this recipe is given here. If the oven is what you have, use our Valentine’s Day Keto Brownies instead, which is an oven-baked recipe with its own times.

Why do the brownies rest for 5 minutes?

The short rest allows the brownies to set after baking and makes them easier to serve from the ramekins.

Can I add other ingredients to the brownies?

The batter here holds two tablespoons of chopped pecans and two of ChocZero baking chips, and that is about as much as it will carry without going loose. Swapping the pecans for walnuts is the straightforward change; adding more of anything, or anything wet, changes how the batter sets in a small deep dish, and no adjusted version of this recipe is given here.

Wrap-Up

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

If you try these, share them on Instagram with the hashtag #buttertogetherkitchen — we’d love to feature your brownies on our page.

Updated — August 17, 2026: We rewrote the article with clearer air-fryer directions, corrected the recipe steps, and were more careful about which swaps we can vouch for.