Help Needed - Making an item from a mod require an item from another mod

So I looked all over the darned place to try to find some kind of tutorial on how the crap to make it so an item would have a recipe that requires another mod's item.

I know mods like @Fargowilta 's Summons and Souls mod have done this, so I know it's possible.

If anyone could link me to a post or tutorial that has a bit more explaining on how to do this, I'd be mighty thankful.

An example is I want to kinda make the Miracle Brew from my compilation mod a tad more...

Help Needed - Making an item from a mod require an item from another mod