
Chicken chimichangas are crispy, deep-fried burritos packed with shredded chicken and cheese all wrapped in a flour tortilla.
Prepare the oil. In a large heavy-bottom skillet, pour in enough vegetable oil to fill it 1 inch full of oil. Heat the oil over low heat. (This will be the oil you fry the chimichangas in. The oil needs to slowly reach about 375°F.)
Line a baking pan. Line a baking tray with paper towels or a drip tray and top it with a wire cooling rack.
Make the filling. In a separate large skillet, heat 2 tablespoons of butter over medium-high heat. Add the diced onion and cook until slightly softened. Add in garlic, chili powder, Mexican oregano, and cumin. Stir and cook until fragrant, about 1 minute. Add the shredded, cooked chicken. Season with salt and pepper. Stir in the green chilies and continue to stir and cook the mixture for another 5 minutes, or until thoroughly heated. Set aside.
Fold your chimichangas. Warm the tortillas in the microwave according to package instructions. Fill the center of each tortilla with about 1/2 cup of the chicken mixture. Top with 3 tablespoons of the shredded cheese. Fold sides over the mixture, then fold bottom over the sides and roll up. Place folded chimichangas, seam side down on a large plate/platter, and repeat with remaining tortillas.
Fry and serve. Slowly lower the chimichangas, one at a time, into the heated oil with the seam down. Cook for about 2 minutes on each side. Long enough for them to become golden brown. Remove from the oil and place the chimichangas on a wire cooling rack with a paper towel or drip tray under them. This will prevent them from becoming soggy, sitting in their own oil. Let them sit for 5 minutes to cool slightly. Top with sour cream, guacamole, pico de gallo, cilantro, or sliced cherry tomatoes before serving warm.