One bag of cornstarch
Several pumps of lotion*
M and I couldn't keep our hands out of it, either. It was so soft and since I used my precious lemongrass lotion, it smelled heavenly.
This is definitely going to be a fake winter tradition!
*It's not an exact science. Just mix it up, and if it's not holding its shape well, add a little more. If you're at all sensitive to chemical smells, use a naturally scented or scent free lotion.