How to Calculate Pumpkin Puree

I’m going to attempt a Pumpkin Ale soon. I have done some recipe research, but still have questions. I will be using Canned Pumpkin Puree in a nylon bag suspended in the boil.

Looking at the can of Libby’s Pumpkin Puree, and working some basic calculations from the label. It says:

“No sugar added” (that’s good), and
“Total Sugars” = 5 g/serving and 3.5 servings /can or
17.5 g/15 wt oz. can.
I will be using 4 cans – which has a potential of adding 70 grams of sugar.

I have to assume this sugar is fermentable, so in my recipe, should i just add 70 grams of table, or brown, sugar and let BS3 do the rest? 70 grams seems like a lot, but I’m not certain all the sugars from the puree will end up in the wort. Am i overthinking this?

Any advise or suggestion will be appreciated!

70g is less than 3 Oz. Doesn’t seem like a lot.

Puree overall will have an impact of decreasing your gravity (because pumpkin puree contains a ton of water). I like roasting my puree because I’m nutty.

Wouldn’t you get more extract if you added the pumpkin to the mash rather than the boil?

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What about just using a pumpkin extract? I haven’t searched, but it must exist.

Thank you for the suggestion. I considered this option. But my concern is a stuck mash. Adding purée would most likely clog the mash — at least, that’s what I’ve read — and that’s a gamble. That said, I have also considered using whole roasted pumpkin and putting those chunks in the mash. But I have reservations on the amount of pumpkin flavor I would extract.

This is another good suggestion. But I have had pumpkin ales in the past and 98% of the time, I can tell a flavor additive (extract) has been included in the brew. Leinenkugel, for example. I can clearly taste what I perceive as a pumpkin extract. I’m trying to go as natural as I can with the hope of creating an enjoyable beer.

That’s a very good point. I’ll check the ingredients on the label to see if I can determine the amount of water in the can.

The link you provided is quite interesting. I like the approach the person outlined in the link! Thanks!

Thinking about it, you’re probably right. I might be overthinking this.

Don’t believe everything you read. That kind of problem is at least as much system related.