Uncertain of how the oil experiment would turn out, I came prepared with a second addition to try: Cloves. Brian hates cloves with a fiery passion that consumes his soul, so I bit the bullet and took one for the team. A whiff of the spice was quite reminiscent of allspice, so a light sprinkle was all I put at the bottom of the holder. Even so, it was more than enough to render a nice cup markedly unpleasant. The cloves fought for control over the mid palate. With sugar, it was more palatable, but not much better a drink. I would not want another cup.
Today did not present us with a winning infusion, but we learned a couple things. Essential oils won't work ( actually they are not recommended for ingestion), and despite it being one of the more commonly recommended spices to add to coffee, cloves didn't work for either of us using our method.