Preheat oven to 350F
Place the tortillas on a flat surface and spread with butter.
In the middle of tortillas put a spoonful of mashed beans, then guacamole, shredded chicken and grated cheese.
Wrap the tortillas into burrito.
Lay chimichangas down in a sprayed baking dish.
You can adjust spiciness of the stuffing to your taste - it is safer that way.
Bake for 15-20 min in preheated oven (350F) until the chimichangas are golden brown and crispy.
Serve warm with additional shredded cheddar cheese, guacamole and salsa if desired.