Creamy, delicious mashed potatoes make a great side dish any time of year, and Alton Brown has the secret to making yours better: Cut the potatoes into triangles before you cook them. Even though Alton's video above is Thanksgiving-themed, you can use this technique any time you're in the mood for mash. Once you've got your potatoes washed and peeled, cut them into 1cm slices. Stack three slices with the end piece on top. Cut in half, then turn and cut in half again (so each piece is quartered). Remove the end pieces and cut the larger slices' quarters into sixths by cutting diagonally across the centre of the slice. You'll end up with a bunch of triangle shaped pieces which will cook more evenly and result in tastier mashed potatoes. Alton stops short of telling us his preferred method of cooking the potatoes, but we imagine boiling would work, just like normal. Check out the video for a demonstration of this technique.
How to Best Cut Potatoes for Mashed Potatoes [Alton Brown via YouTube]