Cut the chicken breasts in half lengthwise so you have four thin pieces.
2 chicken breasts
Mix the cornstarch, Cajun seasoning, salt, and pepper in a wide bowl. Coat the chicken pieces in the spices then set any leftover spices aside.
1 tablespoon cornstarch, 1 tablespoon Cajun seasoning, ½ teaspoon EACH: salt and pepper
Heat the butter and oil in a large frying pan over medium heat. Add the chicken and cook until it is golden, about 5 minutes per side. Remove the chicken from the pan.
2 tablespoons butter, 2 tablespoons cooking oil
Add the garlic to the pan and let it cook for 1 minute. Add any remaining spices to the pan and stir. Pour in the cream and scrape the bottom of the pan with a spatula or wooden spoon to remove any bits that are stuck on. Add the chicken back into the pan and cook for 3-4 minutes, until the chicken is fully cooked and the sauce has thickened. Serve with a little parsley over top for color.
3 cloves garlic, 1 ¾ cup heavy cream, Minced parsley