A few tips for choosing a good one:
- For the sweetest/most flavorful, look for one that's hard with matte skin and a dried out stem.
- Choose one with a greater proportion of neck to seed-filled bulb - you'll get more flesh that way.
- A whole butternut squash can keep for up to four months in a cool dry place. Once it's cut, it will stay fresh wrapped in plastic and refrigerated for up to a week. You can also freeze peeled chunks for months.