You can do it yourself, no need to spend money you don’t need to spend, or use cookbook formulas. All it takes is a little knowledge and a little thought…and a gummy bear. So go out and get a gummy bear. I’ll wait…
No, seriously, the best way to develop a shader for anything is to get it in your hands and look at it. Second best is get a photo.
So get a gummy bear and hold it up to the light. What do you see?
It has color. That’s obvious. If you hold it up to a bright light, does light pass thru it, or is it totally opaque? Well, you can see that light passes thru. It’s not transparent like a window, but light does pass thru. Can you see stuff on the other side? No, but still light is passing thru it.
Okay, so now you know it has color, and it has “translucency”, because light passes thru it (trans - thru, and lucent - light). But it’s not “transparent” like a window. But one more thing you’ll probably notice is that it kind of glows around the edges. It’s subtle, but it’s there. That’s because light enters the gummy bear, bounces around inside, then comes back out and into your eyes. But it only does that around the surface, forming a kind of glow around the edges. That’s called “subsurface scattering”, because it’s light scattering under the surface then coming back out.
And really those are the major components of the surface. Yeah, it’s got a slight bump also, and a little bit of highlight, but those are relatively minor.
So try setting up a material that has those parameters, play around with them, and see what you get.