First, add the vegetable oil to a large pot and bring it up to 350 degrees Fahrenheit. Please use a thermometer to properly check the temperature; this is VERY important when deep-frying anything!
Now, place down the tortilla. *The tortilla is most comfortable to work with if it's room temperature or evenly slightly warmed in the microwave for a few seconds.
Spread the refried beans across the bottom third of the tortilla, leaving 1 inch of the outer part of the tortilla clean.
Spread the chicken filling over the refried beans. Then sprinkle the cheese blend over the chicken filling.
For the slurry, simply stir together the flour and water in a small bowl until smooth. Take your finger and wet the entire top half outer 1-inch edge of your tortilla with the slurry. The slurry will seal your burrito together, so it doesn't bust open while deep-frying.
Now, you are going to wrap the chimichanga like a burrito. Tightly, but gently, pull the bottom half of the tortilla with the filling over and pull it back. Fold one side of the tortilla over to meet the center. Then fold the other side over to meet the center. Lastly, with both sides folded into the center, tightly roll your tortilla forwards up until you have a perfect burrito! Press down to seal the edge with the slurry.
Once the oil has reached 350 degrees Fahrenheit, gently place the "burrito" seal side down into the oil. Fry for 2 minutes, flip it over with a pair of tongs, and fry for 1 to 2 more minutes or just until perfectly golden brown and crispy all around.
Gently lift the chimichanga out of the oil, allow the excess oil to drip off, and place it on a wire rack.
You can dress the chimichanga however you would like, but this is how I prepare mine. I first top half of it with the creamy cheese sauce. Then I drizzle over vegan sour cream, top it with a dollop of guacamole and pico de gallo, and garnish it with sliced jalapenos and fresh cilantro leaves.