Cut sugar pumpkins in half horizontally with a very sharp knife. Use a spoon and remove the seeds and stem. Discard seeds, etc. (unless you will be roasting them).
Put the pumpkins, cut side down on a aluminum foil lined baking sheet that's been sprayed with a non-stick cooking spray. Bake the pumpkins at 375 degrees for about 45-50 minutes, depending on the size of the pumpkins. When they are "done", the skin will be much darker, and you will easily be able to pierce the skin with a sharp knife. Remove pan from oven.
Turn the pumpkin halves over. Use a large spoon to remove the cooked pumpkin. Transfer to a large mixing bowl. Once all pumpkin "meat" has been removed, puree the pumpkin. Use a blender, food processor, stand mixer, or an immersion blender to puree the pumpkin until smooth. Once smooth, put the pumpkin puree in a strainer over a bowl for a few minutes (or you can use cheesecloth), to help remove any remaining liquids. Puree is now ready to use.
To freeze the pumpkin for later use, measure out 1 cup of the puree and spoon it into a quart sized freezer bag. Try to get as much air out of the bag as possible, flatten the bag out, seal, and label bags. Place in freezer. Use within 9 months.
How To Make Pumpkin Puree https://www.thegratefulgirlcooks.com/how-to-make-pumpkin-puree/