Flavored Vodka Results

I made two vodkas so far: ginger and black pepper.
Both recipes infused quickly, within a week.
750ml vodka + either 1Tbsp ginger or 2Tbsp coarsely ground black peppercorns. Give them a shake every day. After a week, strain through a coffee filter.
The ginger made an excellent mixer with pinapple and mango juice plus a few cubes of candied ginger in the bottom.
Black pepper vodka can be a shooter for the bravest souls (although not nearly as bad as a chili pepper infusion I once had. The chemical that makes black pepper hot is less "sticky" than capsaicin so the burn doesn't linger and doesn't travel all the way down.) It also works very well in a bloody mary.