Relatively easy. I cook my pumpkin to convert the starches into sugars for better fermentation and flavor.
This will make 3 gallons:
Clean and quarter a couple nice pie/Halloween pumpkins.
Cook the 8 pumpkin quarters on a cookie sheet with some water covering the bottom, in a 325-degree oven for about 45 minutes, or until fork tender.
(This is the same way I cook acorn squash...)
Once the pumpkin's cooked, scoop the pulp out of the skins and mash it up like you're making a pumpkin pie. You could probably use a handheld immersion blender to make the job easier, too.
This mush goes into the 3-gallon carboy or fermentation bucket, along with 3 pounds of raisins.
Add sugar to bring the specific gravity up to 1.095. I use dark brown sugar for this recipe, and it works out to about 6 lbs total.
Add water to the mix, but only fill to a point well shy of the airlock - or there will be trouble!
Add yeast nutrients, tannin, acid blend, and one packet of your wine yeast of choice. I use an aggressive Red Star Champagne yeast, but watch that final alcohol level, it can bump 18%!
This will be a vigorous ferment, it'll look alive if you're using a glass carboy or Better Bottle as the pumpkin pulp and raisins circulate around with the CO2 produced.
It will also blow the airlock halfway across the house if you didn't provide enough headspace between the must and airlock.
If your wife's head happens to be at the exact spot where the airborne pumpkin pulp and airlock decide to return to earth, the last thing you want to do is laugh. (Oops)
Stir it up about once a day to feed the yeast and expose all the good stuff to the little fellows. After about a week, the ferment will slow down to just a few airlock bubbles/minute, and it's time to rack out the young wine off the pulp/raisins/dead yeast. Check the SG, and add water to replace lost volume (go ahead and sample!), then let secondary fermentation take over.
Subsequent rackings will occur as you watch it clear and settle over the next 6 months or so. It should be ready to bottle between 9 months to 1 year.
My pumpkin/raisin wine finishes at a medium to dark amber color, thanks to the dark brown sugar and plain raisins I use.
It could be lighter in color if one used white sugar, light brown sugar, or golden raisins.