Make sure you pick a good one! For Pineapples there are two tests I always use.First pull on a stem. If it falls out without much effort it’s probably rancid. If you can’t pull a stem out, it’s got a ways to go before it’s ripeSecond, pretend you’re a dog for a minute and start sniffin’! If the Pineapple is ripe it’ll smell sweet. If it’s rancid, it’ll have a hint of vinegar. If it’s got no scent, it’s not ripe.And of course, throw it all in a blender!