Air Fryer Vegan Hashbrown Casserole has become my favorite brunch when I need something hearty, cheesy, and comforting without heating up the oven. The crispy, golden top covers tender hashbrowns in rich vegan cheese sauce, while the sautéed peppers and onions bring sweetness that balances the creamy richness. I make this for Christmas breakfast, Easter, and as a Thanksgiving side dish because it feeds a crowd. It's perfect for potlucks, brunch gatherings, and family dinners since it travels well and comes together quickly. It reheats beautifully for meal prep. Store leftovers in the fridge for 3 to 4 days or freeze for 2 to 3 months.
Preheat the air fryer to 350°F (180°C). Lightly grease a baking dish that fits inside your air fryer.
In a skillet over medium heat, melt 2 tablespoons vegan butter. Add the onion, garlic, and bell peppers. Sauté for 2 to 3 minutes until softened. Remove from skillet and set aside.
1 cup onion, 1 teaspoon garlic, ½ cup green bell pepper, ½ cup red bell pepper, 4 tablespoons vegan butter
In the same skillet, melt the remaining 2 tablespoons vegan butter. Whisk in the flour until smooth to make a roux.
3 tablespoons all-purpose flour
Slowly pour in the non-dairy milk, whisking constantly to prevent lumps. Add the vegetable stock, season with salt and black pepper, and cook until slightly thickened. Stir in ½ of the shredded vegan cheese until melted. Remove from heat.
2 cups non-dairy milk, 1 cup vegetable stock, Salt and black pepper, 1 ½ cups vegan shredded cheese
In a large bowl, combine the thawed hashbrown potatoes with the sautéed vegetables. Pour in the cheese sauce and vegan cream, stirring until evenly coated. Transfer the mixture to the prepared dish. Top with the remaining shredded vegan cheese and bread crumbs.
Air fry for 25 to 30 minutes, or until the top is golden and the center is hot.
Allow to rest for 5 to 10 minutes before serving.
Notes
Thaw the hashbrowns completely: Squeeze out excess moisture with paper towels before mixing so the casserole doesn't get watery.
Whisk constantly when making the roux: This prevents lumps and helps create a smooth, creamy sauce that coats every hashbrown shred.
Use a baking dish that fits your air fryer: Measure your air fryer basket before you start so you don't have to transfer everything to a different dish later.
Flash freeze for meal prep: Freeze individual portions on a baking sheet for 1 hour before transferring to containers so they don't stick together and you can grab one serving at a time.
Add extra vegetables if you want: Diced mushrooms, zucchini, or spinach work well mixed in with the bell peppers for more variety.
Check the center temperature: Use a thermometer to make sure it reaches 165°F in the middle so you know it's heated all the way through.