Butternut Squash soup is great and has a lot of flavor...
I have a recipe for a HUGE batch ( I work in a volume cooking type of environment) but to scale it down a little...
3 lb butternut squash
1 stick butter
2 cups brown sugar
1 cup maple syrup
Salt and Pepper to taste
1 qt of chicken or vegetable stock
1/2 and 1/2 or heavy cream
Peel and cube the squash. Cook well, either boiling or steaming. Strain out liquid and mash with butter. Mash in sugar and syrup. Season with salt and pepper. Slowly whisk in stock ( you may not need it all, just make sure its heated already). Bring to a simmer and slowly add in cream or 1/2 and 1/2 to taste. I like to add a little nutmeg and cinnamon, but its all up to your taste.