There's something aesthetically pleasing about a perfectly formed hamburger patty; especially when it has those little symmetrical grill marks. However, it turns out that smashing your patty during the cooking process actually imparts more flavour. Check out the video to see how it's done.

Takeaway Truth is an occasional Lifehacker feature where we compare marketing images to what you actually get served. Today: KFC's Zinger Double!

The KFC Zinger Double Down King is an "all meat" burger comprising cheese, bacon and a beef patty sandwiched between two KFC breast fillets. In other words, it takes the OTT concept of the KFC Double and elevates it to ludicrous proportions.

Tragically, the Double Down King isn't available in Australia, but don't let that stop you from sampling its colon-clogging delights - as the following taste test demonstrates, it's possible to build your own. The results are spectacular... and probably a bit lethal.

KFC just brought back the Double burger. Hurrah!

McDonald's employees know more about the company's food than anyone. After all, they spend all day cooking, handling and serving the stuff. They subsequently have a pretty good idea of which menu items are great and which are best avoided. Here are four McDonald's products that they are happy to serve you - but would never eat themselves.

You no longer need to wait until mid morning for your Big Mac fix. From today, McDonald's most popular menu items are available to purchase 24/7.

We've talked about the miracles of vacuum-sealing before. Heck, you can make your own sealer for a few bucks. While most people would use it to save food at home, there's nothing stopping you from applying the technique to preserve a KFC Ultimate Box — burger and all — for a cross-country trip.

Have you ever noticed how McDonald's Chicken Mcnuggets come in a handful of suspiciously similar shapes? (The one with the protruding nubbin in every pack is usually the giveaway.) Turns out there are four distinct forms of McNugget: the bell, the ball, the boot and the bow tie/bone. Here's how they are made.

Alas, my McDouble-loving friends, it appears McDonald's has sent the popular burger off into the sunset. From what we know, it won't be replaced with the McSingle, or the McTriple, leaving fans to make do with less-thrifty substitutes.

McDonald's employees know their food inside and out - including products they personally avoid like the plague. They are also trained to help every type of customer reach a purchasing decision. Here are five of their best ordering tips - for frugal, fussy and indecisive eaters.

I'm trying to decide whether or not I'm surprised by the fact that McDonald's remains Australia's favourite fast food, over the likes of KFC and Subway. I'm going to say "no" — despite moves from smaller franchises and a general push for healthiness, one cannot simply ignore the pervasiveness of the big yellow M.

Bugger me, it's cold. Dragging myself out of bed this morning was an effort worthy of the 12 labours of Hercules. If you're feeling similarly glum and frozen, a trip to Macca's may be in order: it's selling a limited-edition range of spicy sides just for winter.

The McDonald's McGold Card is a food-redemption ticket that provides the owner with free, unlimited McDonald's for life. The existence of the card gained international attention after actor Rob Lowe flashed his on Jimmy Kimmel Live in 2015. Since then, it has been revealed that a range of VIPs and celebrities have their own version of the card - from Bill Gates to Warren Buffett. So how do 'normal' people go about getting one? Here are the details.

Hungry Jack's, we need to talk.

As we've opined in the past, burritos are the perfect fast food. They're even more perfect than pizza (case in point: you can't wrap a pizza in foil and stick it in your jacket pocket.) This infographic from Fairmont Hotels breaks down everything you need to know about seven popular burrito styles - from their storied history to the ingredients you need to make your own.

Collins Foods, the owner of Australia's largest chain of KFC restaurants, today posted a 16% lift in full year net profit to $32.49 million. However, the long death of Sizzler restaurants, the popular family steak houses of the 1990s famous for its all-you-can-eat salad bar, cheesy bread, and dessert range, continues.

Takeaway Truth is an occasional Lifehacker feature where we compare marketing images against what you actually get served. Today: McDonald's Big Brekkie Burger. (Plus taste test!)

The KFC you know and love could soon be on the chopping block. The company is implementing sweeping changes to its UK menu with an emphasis on healthier, lighter eating. This includes a 20 per cent reduction in calories per serving and the introduction of vegetarian "chicken". No, really.

The recipe for KFC chicken used to be a closely guarded secret. However, a former KFC employee recently leaked the alleged "11 secret herbs and spices" to the world - and after extensive testing, the recipe checks out.

This video shows you how to make bona fide KFC chicken at home. (The good news is, you probably have most of the ingredients in your cupboard already.)