I bake several butternut at the same time depending on the size. I use Emeril's way of baking the squash and it works great. I rub the butternut with olive oil and salt the outside and place on a cookie sheet. I have a convection oven and set it at 375 for 75 minutes.
After it bakes I let it cool completely, sometimes over night if I bake at night. It will look like this after baking.
I then slice the butternut in half and scoop out the seeds. I will slice it again and peel the skin off and place in a mixing bowl.
Now we add the ingredients. This is what I used for the amount I baked.
Preheat oven to 325..grease a 1 1/2 qt casserole dish
1/2 stick of butter softened or melted.
3/4 c sugar or less
1/2 c milk
sea salt to your liking
cinnamon ( I don't measure, a good sprinkle)
Nutmeg grounded with my nutmeg grinder - a generous sprinkle
4-5 eggs depending on the size (my baby chicks eggs are much smaller than the old hens)
vanilla or almond extract - a good heaping teaspoon
Combine all the ingredients together with your mixer til combined
Pour into the casserole dish and bake for 75 minutes or until set.