90 SECOND KETO BROWNIES
If you have ever been hit by a late-night chocolate craving while maintaining a low-carb lifestyle, you know the struggle is real. You need something fast, something decadent, and something that won’t derail your hard-earned progress. Enter the 90 Second Keto brownie. While many call this style Keto 2 Ingredient Brownies because the base relies so heavily on just chocolate and eggs, we have added one “secret” nutritional powerhouse to take the texture from good to professional.
The Secret Ingredient: Bovine Gelatin in Keto Baking
In traditional baking, gluten provides the “chew” and structure we love in bread and brownies. When you remove grains and sugar, you lose that essential elasticity. This is where Bovine Gelatin becomes the ultimate keto secret weapon.
- What it is: Bovine gelatin is a protein derived from beef collagen. It is unflavored and contains no carbohydrates.
- What it does: Unlike flour, which can make keto baked goods dry or crumbly, gelatin acts as a powerful hydrocolloid. It traps moisture and creates a “gel” matrix that mimics the bite of gluten.
- The “Chew” Factor: In recipes like these 90 Second Keto brownies, gelatin provides that elusive fudgy chewiness that almond flour simply cannot replicate.
- Structural Support: It helps hold keto baked goods together, adding a professional “mouthfeel” to your Keto 2 Ingredient Brownies base.
About Measurements & Precision in Keto Baking
Traditional baking often teaches that cooking is art, but baking is science — meaning it must be precise. That’s why many bakers prefer weighing ingredients in grams instead of using cups. Keto baking does not always follow that traditional model.
You may use cups. You may use grams. What matters most is hydration and dough behaviour. Gram measurements are approximate reference points based on commonly available brands. However, ingredient density varies depending on brand, grind size, and storage conditions. The goal is not to hit an exact number on a scale; the goal is to build proper structure.
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Why It Works
The combination of high-quality fats and bovine gelatin creates a “pudding-style” brownie that sets into a firm fudge once chilled. The gelatin melts into the chocolate during the microwave process and then “sets” the structure as it cools in the refrigerator.
Taste & Texture
Expect a rich, deep cocoa flavour with a velvety mouthfeel. The addition of the extra egg yolk increases the fat content, ensuring the brownie remains moist even when cooked quickly.
Ingredient Breakdown
- 80g Sugar-Free Dark Chocolate: Use a bar sweetened with Erythritol and Stevia for the best flavour profile. Or 1/2 to 3/4 cup sugar free chocolate chips.
- 1 Large Egg + 1 Egg Yolk (Organic): The extra yolk is the key to a fudgy, rich interior.
- 1 tsp Bovine (Beef) Gelatin: Our secret for authentic chewiness.
- Flaky Salt: Optional. To enhance the chocolate notes.
- Avocado Oil Spray: For easy release from the dish.
Step-by-Step Instructions
- Melt the Chocolate: Break the chocolate bar into pieces in a bowl. Microwave in 20-second intervals for 60 seconds total, stirring until smooth.
- Add Binders: Mix in the whole egg, the extra yolk, and the gelatin. Whisk well; the batter will thicken significantly.
- Prep and Spread: Spray a small glass dish with avocado oil. Transfer the batter and spread it to the edges.
- Microwave: Sprinkle with flaky salt. Place the dish on the edge of the microwave plate. Cover with a silicone cover or paper towel and microwave for 90 seconds.
- Chill: Let it cool, then refrigerate until firm. This allows the gelatin to fully set the texture.
- Serve: Cut into 4 pieces.
Recommended Ingredients:
Recommended Sugar-Free Chocolate Chips
Canada: Yupik Organic Dark Chocolate Chips, 70% Cacao, No Sugar Added
USA: Lakanto Sugar Free Chocolate Baking Chips Sweetened with Monk Fruit
Recommended Brown Sugar Sweeteners:
🍯 Swerve Brown Sugar – Erythritol + prebiotic fiber (oligosaccharides) with natural flavors. This is one of the most popular keto brown sugar replacements and measures 1:1 like regular brown sugar.
https://amzn.to/4uw2Xtw
🍯 Truvia Brown Sugar Blend with a Hint of Molasses – Erythritol + stevia leaf extract with a touch of molasses flavor. This one is sweeter than regular brown sugar, so you typically use ½ cup Truvia to replace 1 cup brown sugar.
https://amzn.to/4vCj3T4
🍯 Lakanto Monk Fruit Golden Sweetener – Erythritol + monk fruit extract. This is my personal favorite for many keto baking recipes because it has a rich caramel-like flavor that works very well in sourdough and baked goods. It measures 1:1 like regular brown sugar.
https://amzn.to/3QteFHj
Nutrition (Per Serving)
Note: This recipe yields 4 servings.
- Calories: 125
- Total Fat: 10.5g
- Total Carbohydrates: 0g*
- Net Carbs: 1 g
- Protein: 4g
Why are the carbs zero? We do not count the total carbs in this recipe because they are derived from Erythritol and Stevia, which are non-glycemic sweeteners that pass through the body without being metabolized or impacting blood sugar levels. They are non-impact carbohydrates.
- Full Batch Totals:
- Calories: 500
- Total Fat: 42g
- Total Carbohydrates: 0g*
- Net Carbs: 4 g
- Protein: 16g
The reason we list Total Carbohydrates as 0g while still acknowledging 1g Net Carb comes down to how we treat non-glycemic sweeteners in this specific 90-second recipe:
Total Carbs (The Metabolism Perspective): In the context of this blog, the total carb count is listed as zero because the carbohydrates present are derived from Erythritol and Stevia. These are non-impact, non-glycemic sweeteners that pass through your system without being metabolized or impacting blood sugar levels. From a physiological standpoint, your body “sees” zero impact.
Net Carbs (The Ingredient Perspective): Even though the sweeteners have no glycemic impact, a single chocolate bar still contains trace carbohydrates from the Inulin (fibre) and the unsweetened chocolate itself. For a standard 80g sugar-free bar, those trace amounts typically equal about 4g of Net Carbs for the whole batch.
The Breakdown: When you divide that 4g batch total by the 4 servings (brownies), you are left with 1g Net Carb per brownie.
Essentially, we list “0” for the Total Carbs to emphasize that there are zero impact/sugar carbs that would interfere with a keto lifestyle, while the 1g Net Carb represents the actual structural carbohydrates found in the cocoa and fiber
Beyond the Microwave: Air Fryer, Convection, and Toaster Oven Methods
While the 90 Second Keto method is perfect for instant gratification, you can achieve an even better crust and more even set by using alternative appliances. Because these Keto 2 Ingredient Brownies rely on bovine gelatin for structure, the gentle heat of an oven or the rapid air of an air fryer can enhance the fudgy interior while crisping the edges.
Air Fryer Method
The air fryer acts like a high-powered convection oven, making it the best alternative for a “baked” texture without heating up the whole house.
- Temperature: Set your air fryer to 325°F (160°C).
- Time: Air fry for 8–10 minutes.
- Tip: Ensure your glass dish is air-fryer safe and fits comfortably with space for air to circulate around the sides.
Convection or Toaster Oven Method
A convection or toaster oven provides steady, surrounding heat that helps the bovine gelatin and egg yolk bind perfectly.
- Temperature: Preheat to 350°F (175°C).
- Time: Bake for 12–15 minutes.
- The “Toothpick” Rule: Since there is no flour, the centre will still look slightly soft when pulled out; it will firm up completely as the gelatin sets in the refrigerator.
Critical Step: The Cooling Phase
Regardless of which heating method you choose, the bovine gelatin requires a temperature drop to “lock” the brownie’s structure. Always let the brownies reach room temperature before transferring them to the refrigerator to firm up. This ensures you get that authentic, chewy bite every time.
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Print90 SECOND KETO BROWNIES
This 90 Second Keto Brownies is a keto-friendly, grain-free recipe designed for low-carb lifestyles, delivering balanced texture and flavour without added sugar.
- Prep Time: 2 Minutes
- Cook Time: 90 Seconds
- Total Time: 3.5 Minutes
- Yield: 4
- Category: Dessert, Snack
- Method: Air Fryer, Convection Oven, Microwave, Toaster Oven
- Cuisine: American
- Diet: Diabetic, Keto, Low-Carb
Ingredients
- 80g Sugar-Free Dark Chocolate (approx. 1 full chocolate bar or 1/2 cup to 3/4 cup sugar-free chips)
- 1 Large Egg + 1 Egg Yolk (Organic)
- 1 tsp Bovine (Beef) Gelatin
- Flaky Salt (for topping and optional)
- Avocado Oil Spray
Instructions
- Melt the Chocolate: Break the chocolate bar into pieces or add the chips into a small microwave-safe bowl. Microwave in 20-second intervals for about 60 seconds total, stirring between each burst until smooth.
- Mix the Batter: Add the whole egg, the extra egg yolk, and the beef gelatin to the melted chocolate. Mix well until the batter begins to thicken.
- Prepare the Dish: Lightly spray a small glass dish with avocado oil.
- Spread and Season: Transfer the batter to the glass dish, spreading it evenly to the edges. Sprinkle the top with flaky salt.
- Microwave: Place the dish on the edge of the microwave plate. Cover with a silicone cover, paper towel, or microwave-safe lid. Microwave for 90 seconds.
- Set and Serve: Remove from the microwave and let it cool. Transfer the dish to the refrigerator to firm up. Once chilled, cut into 4 pieces.
Notes
Note on Carbohydrates: We do not count the total carbs in this recipe because they are derived from Erythritol and Stevia, which are non-glycemic sweeteners that pass through the body without being metabolized or impacting blood sugar levels.
Nutritional Facts (Per Brownie)
Serving Size: 1 piece (1/4 of recipe)
- Calories: 125
- Total Fat: 10.5g
- Total Carbohydrates: 7.5g
- Net Carbs: 1g
- Protein: 4g
Full Batch Totals (Entire Dish)
- Calories: 500
- Total Fat: 42g
- Total Carbohydrates: 30g
- Net Carbs: 4g
- Protein: 16g
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