While you can make this with canned pumpkin butter I suggest only using fresh pumpkin if you plan to can it. Using canned pumpkin is great if you plan to eat it right away. Add the sugar and spices and stir well. Simmer the pumpkin mixture for 30 minutes stirring constantly.
For most of the low-carb keto recipes below, you will need cooked pumpkin puree. You can use either store-bought canned pumpkin puree (or pumpkin pie filling) or you can puree cooked pumpkin yourself. No matter which one you decide to use, the cooked pumpkin puree must be low in moisture.
Slow cookers can often help us save time, but this recipe is so easy and quick that I don’t bother with the slow cooker. After all, my sugar free pumpkin butter only needs to simmer for 20 minutes. It would take longer than that just for my crockpot to heat up!
I have water bath canned pumkin puree and pumpkin butter for over 30 years as did my grandmother, mother and my other family members still do. You are not encouraging anyone to do it you are stating how you do it. I also water bath green beans, deer meat, applesauce and just about anything else that fits in a jars.