Yes, you can. If you're worried about frozen-food-in-the-fryer disasters along the lines of the whole frozen turkey in the fryer flamethrower thing, I actually asked a similar question to Kenji Lopez-Alt for a similar reason. read more
Deep frying fries while frozen is one of the best ways to get them incredibly crispy. Since when frozen the fries are quite dry, making the end result crispy. You might have some trouble in a shallow pan but you can always reuse the oil in large batches. read more
First of all you can fry anything. However the outcome of the frenchfries would be different. They may have a “unique” texture. They would probably be extra crispy. It could be a tasty dish if mixed with anything else. Good luck with your fry frozen French fries. read more
To create crispy frozen French fries without having to cook them in a deep fryer, toss them with oil prior to oven-baking them. Simply placing the French fries into a preheated oven may be easier and less messy than using a pot or deep fryer filled with hot oil. read more
There is no reason to twice fry frozen french fries. Fries that are "double fried!!1!11!" and emphasized as such in advertising are hand cut fries, cut from raw potatoes and usually cut larger than fast food fries. read more