The only addition to my recipe is coir. It seems, I underestimated it for many years and now see the great properties it can bring to dung lovers. Since I never really had measurements before, I decided to do one for for this post:
1 part manue
1/2 part verm
1/2 part coir
1/16 part gypsum(just a bit)
For a cake formula I throw in 1/2 part BRF or any other grain flower
First I pour some of my field composted horse manure in a bowl:

Then I break up all clumps and remove any wood, rocks etc, to make it very fluffy. If using aged manure patties, do the same thing:

I then add the coir and break up as much as possible:

Then add the verm and gypsum:

If making cakes, or planning on sterilizing you can add BRF:

I then mix all very well in dry form before adding water, breaking up any more clumps I may have missed:

Lastly add water slowly and feel with your hands until you have attained field capacity:

Now all you need to do is sterilize or pasteurize, using any method that you feel comfortable with. Just remember if you sterilize your sub, you must adhere to sterile tek. during spawning or inoculation. If pasteurizing, you can spawn in open air. I have done it both ways with equal success.
And of course this recipe will work with cubes or any other dung lover.
Peace and happy growing to all!