Don't get this free Jiffy Mix recipe book mixed up with Jiffy Lube. The last thing you want to do after requesting it is pour corn muffin mix into your car's engine. Sure, it'll make your exhaust smell delicious, but on the flipside you probably won't be driving anywhere soon.
You can request a physical copy or go straight to an online version. This freebie has been available for over a decade now, so I like to repost it every 6 months just for new readers who might not be aware of it.