Please post your recipe. I'm still thinking regarding my proportions, and yours will help me.
The coffee, of course, is the BIG variable. I like Sumatra coffee so that's what I used. It has less acid and is described as earthy, floral, chocolatey, and best enjoyed black. Kona I like. Guatemalan I don't like. Everyone's mouth is different. Use what you like.
I decided to cold brew to get the most flavor - smooth, "sweet", wonderful. The basic recipe is something like 4 tbls per 8 oz water, fridge for 18 hours, strain. Once "brewed" it will last a couple days in the fridge. Of course, this is one of those things where you have to play with the ratios to see what you enjoy.
I opted to make a strong cold brew concentrate which is "intended" to be mixed with 2 parts water for drinking. I think 1:2 is for mortals. I like 1:1 and that's what I decided to do here. (I've also had it straight - that takes the definition of "coffee buzz" to an incredible new level!)
Cold brew - 14 oz coffee, 3 qts water
3 qts water (you'll lose some water to the beans; add what you want but don't go over 1 1/2 gal in primary)
2.86 #s dark brown sugar (I got to SG 1.088)
1 tsp nutrient powder
1/4 tsp tannin
2 1/2 tsp acid blend (I got to a pH of about 3.6)
yeast (I used 71B)
If I need to top off the carboy I plan to use more cold brew.
Back sweetening I plan to use a dark brown sugar syrup and 2 tsp vanilla.
There's a lot of flavors here. Nectar of the gods or undrinkable? Patience rears it's ugly head yet again.
I only have 6 months under the wine making belt, learning every day (Thanks WMT!), so I hope I can intelligently tweak the recipe next time. I am also curious what you'll do.