Preheat your oven to 400 degrees Fahrenheit. Line a rimmed baking sheet with parchment paper. Set aside.
In a large skillet over medium heat, break up the ground beef, browning it. Once it begins to brown, add in the onion, garlic, salt, pepper, and spices.
1 pound ground beef, 1 small yellow onion, 3 garlic cloves, 2 teaspoons chili powder, 1 teaspoon kosher salt, 1 teaspoon ground cumin, 1 teaspoon paprika, 1/4 teaspoon black pepper
After the beef is cooked through, remove the pan from the heat and add in the cheese and refried beans.
16 ounces refried beans, 2 cups shredded cheddar cheese
Add a little less than a cup of the filling to each tortilla shell. Fold the top and bottom of the tortilla in towards the filling, then roll the shell around the filling into a burrito shape.
5 burrito-sized flour tortillas
Place each one seam side down on the prepared baking sheet. Brush the chimichangas with oil. Bake for 15 to 20 minutes or until they are golden and crispy.
2 tablespoons vegetable oil
To serve, top with sour cream, guacamole, diced tomatoes, and shredded lettuce.