I put it in my pantry the whole time and never open it.
Can I still use it?
throw it away!
I wouldn't use it. Don't waste your time & other ingredients.
throw it out!
They have expiration dates for a reason always always go by the dates when baking especially!!
I would throw it out, too. As a matter of fact, I tossed some this weekend. I saw a news report once that it was a health risk to use out of date things like Bisquick, etc. so I always go by the date now.
When in doubt throw it out! --a motto I live by!
If you have kids use it for crafts like paper mache and homemade play dough, if not toss it.
Check your spices, too. I did a big clean out this past fall and I was amazed how much I pitched. Doesn't do me a bit of good to buy it on sale if I end up throwing it out, huh? My pantry is much sparser, but at least it's easier to find stuff.