Preheat oven to 350 degrees and spread the pumpkin seeds on a baking sheet.
Bake for 10-12 minutes, until lightly golden. Cool for 15-20 minutes.
Put the pumpkin seeds in a food processor. Run the food processor for approximately 4-5 minutes, until the pumpkin seeds begin to have the texture of butter. If necessary, stop the food processor and scrape the sides.
Continue running the food processor for another 2-5 minutes until the pumpkin seeds have the texture of butter. Add some of the oil, if needed, until the desired consistency is obtained.