1teaspoonDiamond Crystal kosher salt(or ½ teaspoon fine salt)
Place the butternut squash cubes in a large microwave-safe bowl. Add ½ cup water, cover, and microwave until tender, about 15 minutes. Drain well.*
Place the cooked butternut squash along with the remaining ingredients in your food processor. **
Process until smooth, 1-2 minutes, stopping to scrape the sides with a spatula as needed. Start processing on low, then process on high until smooth.
Serve the mash immediately. Keep leftovers in the fridge, covered, for 3-4 days.
*If using frozen butternut squash cubes, microwave them according to the package directions and drain well. **Using the food processor is the easiest method. But you can use a potato masher or even a fork if you don't mind some elbow grease and a slightly lumpier consistency.