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.

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.

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.

Mad Mex is going full vegan, with dairy- and lactose-free cheese now available at all Australian restaurants. (Best of all, it's currently free to add to any menu product.)

Mad Mex swears on the eyes of orphan children that its new product looks like real cheese, tastes like real cheese and melts like real cheese. We conducted a blind taste test to uncover the truth.

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.

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.

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.

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!)

I'm currently in the US for a business event. One of the things I've never done, but is practically a tradition for many of my friends when they're here, is to eat at In-and-Out Burger. So, I'm wondering what all the fuss is about. Is In-N-Out Burger that good? Or are the burgers overrated? I visited an In-N-Out Burger joint on the Las Vegas strip to find out.

Outside of ordering chicken nuggs for potential Lifehacker articles, I wasn't a big fan of McDonald's "mymacca's" app. It was clunky and constantly kicked me out - not things I was all that happy with when you're trying to order fast food. But now, Maccas has overhauled the app! So how is it?

Most leading fast food franchises are available in multiple countries around the world. However, the menu options can vary wildly depending on the tastes, culture and customs of locals. Here are ten extreme takeaway oddities that you can only get overseas - from Burger King's fabled black Kuro Burger to KFC's "Fish Donuts". If you're a fast food fanatic, consider this your bucket list!

Takeaway Truth is an occasional Lifehacker feature where we compare marketing images against what you actually get served. Today: Hungry Jack's Minis.

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

A McDonald's customer in Sydney has been questioned by police after failing to return the wrong takeaway order. The customer decided to eat the incorrect order - which exceeded his purchase by approximately $17 - to save himself a trip back to the store. This resulted in police arriving at his house to accuse him of stealing. (Yes, really.) So is it legal to keep takeaway food you receive by accident?

"Is McDonald's open on Good Friday?" "What about Easter Sunday?" "Is it open on Easter Monday?" These are questions our intrepid fast food reporters get asked every April. Personally, we're not sure how anybody could have room for a Big Mac and fries after all those chocolate eggs - but some Aussies have prodigious appetites.

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

Dear Lifehacker, I work from home and buy myself a takeaway lunch once or twice a week. Unfortunately, the only options near my house are a burger shop or a bakery that sells hot pies. Neither store has any nutritional information on their menu, so I'm not sure which is worse. Am I better off grabbing the burger or the meat pie?