Preheat the air fryer: Set it to 375°F (190°C) for about 3–5 minutes while you assemble the filling.
Cook the add-ins: If using sausage or bacon, cook and crumble it. Sauté the bell pepper and onion in a small skillet over medium heat with a touch of oil until softened, about 3–4 minutes. Set aside.
Whisk the eggs: In a bowl, whisk eggs with milk, garlic powder, cumin, smoked paprika, salt, and pepper.
Aim for a smooth, well-mixed base.
Scramble gently: Melt butter in the skillet over medium-low heat. Add eggs and cook, stirring slowly, until just set but still soft and glossy. Take off the heat early—they’ll cook more in the air fryer.
Combine the filling: Stir in the sautéed veggies, cooked meat (if using), and half the shredded cheese. Taste and adjust seasoning.
Warm the tortillas: Wrap tortillas in a damp paper towel and microwave for 20–30 seconds, or warm briefly in a dry skillet. Warm tortillas roll without cracking.
Fill and roll: Place 2–3 tablespoons of filling on the lower third of each tortilla.
Sprinkle a little of the remaining cheese on top. Roll tightly into taquitos, seam side down.
Oil lightly: Brush or spray the taquitos with a thin layer of oil. This helps the tortillas crisp and brown.
Air fry: Arrange taquitos seam side down in a single layer in the basket, leaving space between them.
Air fry at 375°F (190°C) for 6–9 minutes, turning once halfway, until golden and crisp.
Serve hot: Let them cool for 1–2 minutes to set, then serve with salsa, hot sauce, sour cream, or avocado.