If you want a firmer texture, use 4 Tbsp for gummies (pictured above). For a less firm texture like jello, then use 3 Tbsp.
These aren't crazy sweet so bump up the sweetener if you prefer, and add to taste.
For vegans/vegetarians, I have not tried this with agar powder or flakes. If you give this a whirl, let me know how it turns out!