I meant a muslin sack during boil. I’ve been convinced that no powder goes into the secondary.
My plan (tentatively) is to do this:
Add 4-6oz of powder with 5-10 minutes left in the boil, possibly in a muslin sack to prevent particles from getting into the wort.
Soak 6-8 oz of nibs in a liquor. Either vodka or bourbon, to make a tincture. Maybe I’ll split half into bourbon and half into vodka? Let them sit for 3-4 weeks.
Then I will add one tsp of vanilla extract into the tincture. Add the whole tincture into the secondary to sit for a few weeks before bottling.