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air fryer balsamic brussels sprouts with red onions in a white bowl

Air Fryer Crispy Balsamic Brussels Sprouts

Air Fryer Roasted Crispy Fried Balsamic Brussels Sprouts is a quick and easy keto recipe with balsamic vinegar glaze and red onions. This post includes temperature and details for how long to cook brussels sprouts. This vegetable side dish only takes minutes to make using fresh or frozen brussels sprouts. Drizzle the veggies with honey or sprinkle with parmesan if you wish!
Course Appetizer, dinner, lunch
Cuisine American
Keyword air fryer brussels sprouts, air fryer keto recipes, air fryer vegetables
Prep Time 10 minutes
Cook Time 10 minutes
Total Time 20 minutes
Servings 5
Calories 46kcal


  • 1 1/2 -2 cups fresh brussels sprouts each sliced in half
  • 1/2 cup sliced red onions
  • 1 tablespoon balsamic vinegar
  • 1 tablespoon olive oil or cooking oil spray
  • salt and pepper to taste


  • Add the brussels sprouts and sliced red onions to a bowl. Drizzle olive oil (or spray cooking oil) and balsamic vinegar throughout. 
  • Sprinkle salt and pepper to taste. Stir to evenly coat.
  • Spray the air fryer basket with cooking oil.
  • Add the brussels sprouts and onions. I was able to add the entire amount to the basket without needing to cook in batches. I have the 5 quart Power Air Fryer. Do not overcrowd the basket. Cook in batches if necessary for your air fryer model.
  • Cook for 5 minutes on 350 degrees. 
  • Open the air fryer and shake or toss the veggies with tongs.
  • Cook for an additional 3-5 minutes. At 8 minutes mine were slightly charred but still soft. Right at 10 minutes, mine were crisp. Every air fryer brand cooks differently. Use your judgment to assess the optimal cook time.
  • Cool before serving.


Can You Air Fry Frozen Brussels Sprouts?

In general, fresh brussels sprouts will work so much better. If you use frozen brussels you will have to cook them first (using the same temperature). After the brussels are no longer frozen, then add the balsamic vinegar and seasonings and place the brussels back into the air fryer. The brussels may need up to 12-minutes to cook, but use your judgment.


Serving: 1serving | Calories: 46kcal | Carbohydrates: 4g | Protein: 1g | Fat: 3g