Do I need a
panini press to make panini? Can I just use my
Foreman grill? How about a grill pan or skillet? There seems to be quite a bit of debate on cooking forums over which grilling method makes the best panini? Oh, and people are
very adamant that their method is the best. But, you know, I haven't ever seen anyone mention that they've actually tried more than one method...so how can they truly know if one is better than the other? So I decided to make myself the guinea pig upon realizing that I actually had the tools on hand to make panini in three common ways. The truth is,
all of these methods will work - BUT, I learned that some methods produce better results and are easier to execute than others. Want to know the pros and cons of each method? Read on!
THE TEST SUBJECT: Good ol' basic grilled cheese sandwich - cheddar cheese on sliced sourdough, with melted butter brushed on top. I prepared identical sandwiches using each method.
NOTE: This experiment could hardly be construed as scientific, but will hopefully shed a little light on the differences between three popular panini grilling methods.
Panini Press

Not surprisingly, the machine that was designed specifically to make panini produced the best results! What gives it the advantage is that it allows you to regulate both the grill height and heat, which are vital to making panini that are crispy on the outside, cooked on the inside, and adequately (but not overly!) pressed. My grilled cheese sandwich came out nice and evenly crispy on the outside with perfectly melted cheese on the inside. The grill produced shallow golden grill marks. And it was incredibly easy - just assembled the sandwich, put it on the grill, closed it and the machine did the rest. A perfect grilled cheese sandwich with little fuss - what more can you ask for?
What is the downside to this great gadget? Well, some would say the price. At $100, it's not the cheapest appliance in your pantry. If you anticipate only making panini on very rare occasions, it will probably be difficult to justify the expense. Note that there are, however, a wide range of models available, many of which are less expensive. Also, compared to the other two grill methods I tested, the panini press took the longest to heat up initially and to grill the sandwich. So if time is of the essence, one of the other methods may be preferable.
George Foreman Grill

(model tested: The Champ GR10AWCAN, now discontinued)
PROS: Fastest, easy to use, even heating
CONS: Poor crisping, cannot regulate grill height or heat
Ah, the Foreman grill! So many of us have these tucked away in our kitchens and we love them. But can they make good panini? I would say, "Yes, but..." The model I tested, which I received as a gift about 8-10 years ago, heated up incredibly quickly - in about a minute. Just like with the panini press, it's incredibly easy to use - just load the sandwich on the grill, close it, and wait. Because the heat comes from both the top and bottom it's distributed evenly, which is essentially for good panini. However...
How could I tell the sandwich was done? By the sizzle of a whole lot of cheese that escaped and was bubbling all over the grates! Unfortunately, due to the fact that you cannot regulate the height of the grill (it's possible this feature now exists on newer models - I'd welcome any comments on that), the sandwich was smushed too much, causing the cheese to ooze more than would be desired. Also, even though the heat was distributed evenly, I couldn't regulate it (again, this may now be possible on newer Foreman grill models) so the sandwich cooked too fast and did not come out as toasted and crispy as it did on the panini press. If you're looking to make panini and you've already got a Foreman grill, you may be able to make halfway decent panini without incurring the expense of a panini press.
Grill Pan + Cast Iron Skillet

(models tested: Calphalon One Nonstick 11-Inch Square Grill Pan, Amazon.com, $49.99; Lodge Logic 10-1/4-Inch Pre-Seasoned Skillet, Amazon.com, $12.99)
PROS: Cost (if you already have the pans), grills quickly
CONS: Uneven heating, challenging to regulate grill pressure, cumbersome, FIRE!!
Granted, some people may be more adept at executing this method - but I'm not exactly a novice in the kitchen and I had a really hard time coordinating the two pans to any degree of success and damn near started a fire in the kitchen! The most common reason people advocate this method of grilling panini - pressing a sandwich between two heated pans on the stove - is to save on cost. You've already got the pans, they say, so no need to buy any special apparatus to make panini. And, unlike with my Foreman grill, you can regulate the heat to some extent - at least on the bottom - by adjusting the flame on your stove. As a result, this can be a relatively quick grilling method if you raise the heat high enough.
Alas, due to the fact that you can't regulate the heat on the top, I found I was left with uneven heating. As a result, my sandwich did come out nice and toasty with great grill marks on the bottom...but the upper half of my sandwich actually stuck to the skillet!! If you've ever tried to lift a hot 10" cast iron skillet with one hand (that's currently afflicted with tendonitis due to carrying around an infant!) and a spatula to scrape off half a grilled cheese sandwich in the other you'll know that it is not an easy or particularly safe task! Also, because I was unable to regulate the pressure with which the sandwich was pressed, a lot of cheese escaped out of the sides. I may have had more success if I'd just used one pan - the grill pan - and flipped the sandwich mid-way through. But then I'd need something else heavy, like a foil-covered brick (which I don't have lying around the house) to press it.
And, oh yes, the near-fire - after I'd preheated my skillet I went to lift it with potholders and one of my potholders must have gotten a little too close to the flame. Next thing I know I smell this fume-y odor and notice char marks on the potholder - yikes! I'm just saying...if I didn't have to mess around with maneuvering the skillet (a task I try to minimize) it wouldn't have happened. Perhaps you all are more coordinated than I :-)
The bottom line...
You can make great panini with a panini press, a Foreman grill or a grill pan/skillet - it's all a matter of taste and your preference for convenience, ease and cost. Disagree with any of these results? Try the smackdown in your own kitchen and let us know what you come up with!