This easy pumpkin mousse recipe from King Arthur Flour IS easy if you happen to have all these miscellaneous ingredients on hand. The boiled cider can be replaced with molasses and the pumpkin flavoring is optional, but there is no replacement for their pastry cream filling mix. Would it be the same if you just added instant vanilla pudding? I don't think so, but I'm going to see if I can find a recipe. Tasters on this were neighbors Ann and Bernie, the Hub, Andrew and me. All of us liked it. It is kinda like pumpkin decadence, without being too sweet, and some felt the nuts and whipping cream masked the true pumpkin flavor of the mousse. So if you happen to have these ingredients or their equivalents on hand or are looking for a non-baked replacement for pumpkin pie, this recipe might be just the ticket.