Spread the pumpkin puree into a smooth layer on a plate. Take a stack of paper towels and gently press against the pumpkin puree so the paper towels absorb the liquid from the pumpkin. Scrape the pumpkin puree into a pile, spread it out again, and repeat this process until the pumpkin feels pretty dry. There should be around 75-80 grams or roughly 1/3 cup of pumpkin after drying it out.