Crispy, caramelized Brussels sprouts with a bright lemon finish and a sprinkle of Parmesan and toasted pecans make a side dish that tastes indulgent yet stays friendly to blood sugar. The air fryer speeds up browning with minimal oil, so you get restaurant-quality edges and tender centers. This is the kind of recipe that proves the best air fryer for keto living can also produce craveable vegetables everyone will eat. Each serving lands at about 5 grams net carbs, thanks to fiber-rich sprouts paired with heart-healthy fats from extra-virgin olive oil and pecans. Those fats help slow digestion, which supports steadier glucose. Brussels sprouts also deliver vitamin C, vitamin K, and antioxidants, making this side as nourishing as it is satisfying. Want a simple pairing idea for a balanced plate? Serve it next to keto air fryer chicken breasts. For more poultry inspiration, browse [more chicken recipes](/recipes/category/poultry). This method works beautifully in a 5.8 qt air fryer for low carb weeknights and scales easily to a diabetic friendly 8 qt air fryer when feeding a crowd. The high-heat circulation creates crisp edges without needing a breading or sugary glaze. If you like a touch of sweet-tart finish, the optional sugar-free vinaigrette uses a small amount of allulose or erythritol to keep carbs in check. For best texture, preheat your air fryer and avoid overcrowding. A light mist from a [quality olive oil sprayer](https://rocktopgear.com/amazon) coats the sprouts evenly without excess calories. If you cook proteins alongside this side dish, verify doneness with a [digital meat thermometer](https://rocktopgear.com/amazon) and follow USDA guidance: 165 degrees Fahrenheit for poultry, 145 degrees Fahrenheit for pork, beef, and lamb with a 3 minute rest. Shopping for equipment? Here is a dependable [air fryer](https://rocktopgear.com/amazon) I recommend for consistent results. Serve warm with a squeeze of fresh lemon. Leftovers keep 3 to 4 days in the fridge and re-crisp nicely in the air fryer at 350 degrees Fahrenheit for 3 to 4 minutes. For meal prep ideas, see our [beginner's air fryer guide](/blog/beginners-air-fryer-guide) and [keto meal prep tips](/blog/keto-meal-prep-guide). This side also pairs perfectly with our tangy, crunchy [keto coleslaw](/recipes/keto-coleslaw) for a full low-carb spread. FAQs: **Can I use frozen vegetables instead of fresh in this recipe?** Yes. Use frozen halved Brussels sprouts straight from the freezer. Add 2 to 4 minutes to cook time, and pat them dry after the first shake to drive off moisture. **Can I use a convection oven instead of an air fryer for this recipe?** Yes. Roast at 425 degrees Fahrenheit on a preheated sheet pan for 18 to 22 minutes, tossing halfway, until browned and tender. **What low-carb sweetener works best as a sugar replacement here?** Allulose melts and browns most like sugar, while an erythritol blend keeps carbs low and stays crisp. Either works in the optional quick vinaigrette below.
Prep: 10 min. Cook: 13 min. Servings: 4.