So you took advantage of Blizzard's little Cooking leg up during Pilgrim's Bounty (don't be ashamed, I did, too), and you want to know: what's next? The holiday let you level up all the way to 350 Cooking with easily purchased vendor items, which was awesome, but cooking tops out at 450, so maybe you're wondering how to get up there. Let us help.
You may not have made it all the way to 350 during the holiday -- if you need to nab a few other points, you'll have to head to Outland and level up there for a little bit. Talbuk Steak is a good one to do if you need that extra boost -- it's vendor purchased, easily farmable (or buyable on the AH), and the Stam boost isn't bad. Once you've hit 350, then you'll need to head to Northrend. You can train at the cooking trainers in the faction inns in Dalaran. You'll probably also want to stop off and pick up the Northern Cooking quest, as Northern Stew will help you get relatively easily to 375. After that, it's time for the booze.