Is It Healthy: Cooking Spray by Dana Angelo White in Is it Healthy?, May 1, 2013
Using cooking spray as a replacement for oil and butter can help cut back the calories. Since butter and oil have 100 to 120 calories per tablespoon (respectively), switching to a spray can mean fewer calories (and grams of fat) in your cooking.
Many brands use actual oils (such as olive and canola) as the primary ingredient, others rely on other types of oil and artificial flavorings– check ingredient lists on your brand of choice.
When used in a nonstick pan, a light coating of spray can allow for grilled cheese, French toast and eggs that aren’t glued to the pan. Spray is also good option to help give oven-baked breadings a crispier crust. A neutral flavored spray (like canola oil) can also be used to grease baking dishes and cupcake pans.