Add one crushed garlic clove and 3 - 4 mullein flowers or leaves, crumbled gently, to 1/3 cup oil and infuse (check recipe notes).
After infusing, strain the oil with cheesecloth to prevent any small hairs or pieces of garlic from getting through. You want the oil to be completely clear (no 'stuff' inside your ears!).
Store in a dark glass bottle and keep in a dark, dry place for 3 months.