Polyjuice Potion

FIRST:

Add 3 measures of fluxweed to the cauldron (must have been picked on a full moon).
Add 2 bundles of knotgrass to the cauldron.
Stir 4 times, clockwise.
Wave your wand then let potion brew for 60-80 minutes, based on cauldron type.

NEXT:

Add 4 leeches.
Add 2 scoops of lacewing flies to the mortar, crush to a fine paste, then add 2 measures of the crushed lacewings.
Heat for 30 seconds on a low heat.
Wave your wand to complete this stage of the potion.

THEN:

Add 3 measures of boomslang skin.
Add 1 measure of bicorn horn to the mortar, crush to a fine powder, then add one measure of the crushed horn.
Heat for 20 seconds at a high temperature.
Wave your wand then let potion brew for 18-24 hours, based on cauldron type.

FINALLY:

Add 1 additional scoop of lacewings.
Stir 3 times, counter-clockwise.
Split potion into multiple doses, if desired, then add the pieces of the person you wish to become.
Wave your wand to complete the potion.