Measuring Gelatin


I’m working on a post for my new clear gummy recipe and the recipe template program I use has a pull-down menu for units that doesn’t include “envelope” (it has “packet” but that means different things to different people). I measure Knox unflavoured gelatin for the gummy by the envelope (you can use store brand, but I’ve found Knox to have better clarity, and I buy it in large packs from Amazon).

To be accurate for recipe purposes, and to assist those of you who aren’t buying it in envelopes or are in other countries where the envelopes may vary, I figured I should look up how much is in an envelope. Knox’s official website says, “1 pouch is about 2 1/2 teaspoons (7g) unflavoured gelatine. If a recipe calls for 1 tablespoon, use 1 pouch of unflavoured gelatine. Each pouch will gel 2 cups (500mL) of liquid and up to 1 1/2 (375mL) cups of solids.”

But that website is kind of old, and the Kraft version of the website doesn’t state the amount per envelope at all (other than if you do the math that an 8 oz box of 32 envelopes means 0.25 oz per envelope, which is about 7g).

Thus, being the skeptic-minded person I am, I went and measured. I emptied an envelope into one of my little shot-glass measuring cups, then tapped and spun it gently to get a level surface. I had some trouble getting good photos, but as you can see, there’s no way that’s 2 1/2 tsp. It’s not even 2.

Gelatin in measuring glass with flash

This photo taken with a flash shows that it's slightly over 1 1/2 tablespoons but a bit under 2 teaspoons.

Gelatin in glass measuring device without flash

This photo without a flash makes it look closer to 1 1/2 tablespoons but the top layer is glowing a bit.

Having seen it with the naked eye, I’d call it a bit under 2 tsp.

I then measured it by weight on our digital scale, pouring it from the shot glass into a little glass dish that I’d tared out to zero first. It flickered between 5g and 6g at first until it settled on 6g. Just to be thorough, I got a fresh envelope and weighed that: 8g (but that includes the paper). Then I tared the shot glass, and poured the fresh envelope into that. That flickered between 6g and 7g. It is possible that enough stuck inside the shot glass when I poured it into the second glass dish to have lowered the first measurement.

The official weight per envelope is 7g. There isn’t a significant difference, so I’ll concede to the official weight as 7g per envelope, but there’s no way it’s 2 1/2 tsp. Even the second envelope was still a little under 2 tsp for volume.

Therefore, if you’re going to measure your own gelatin for any of my recipes (and since I just noticed Amazon’s out of stock of the bulk envelopes I may have to convert to the cans myself), here’s how you should count it:

1 envelope of Knox gelatine = 7g or just under 2tsp.

So for basic gummy, which uses 4 envelopes: 28g or about 2 1/2 tbsp.

I’m very interested in finding out what measurements people get elsewhere for the envelopes. So if you have a moment to spare, check them out and let me know!

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