Canned Vs. Fresh Pumpkin (Cooking with Pumpkin) - as part of the expert series by GeoBeats. When the fall comes around, you are going to start seeing, in the supermarkets, all types of canned pumpkins and the small pumpkins that you will cook with. Using canned pumpkin versus fresh pumpkin, this is very convenient. You buy it in the store, it sits in your pantry and in the afternoon or evening when you need to bake something, it is ready to go. You can make a batch of cookies in 20 minutes. Versus buying a pumpkin, roasting it for an hour and a half, 45 minutes to an hour and a half, letting it cool down, pulling it out. Pureeing it, that is the big difference in time. Costs are about the same. A can of pumpkin versus a pumpkin to buy so, the cost is about the same. It really comes down to convenience and honestly, for Thanksgiving dinner, I am going to want to use a freshly puree pumpkin for that great pumpkin pie if I am going to go to all that trouble of making fresh pastry and make a beautiful pie, I would go ahead and buy a pumpkin versus canned.