Brewing

Brewing is the method by which many potions, are made in Minecraft. It is a function that will first be made available in Beta 1.10. Originally Potions were to be brewed in Cauldrons but Jeb later tweeted that Notch and he had come up with a different way to brew.

According to code found in the Beta 1.9 Pre-release 2, Potions are brewed by adding water to a Cauldron, and then combining ingredients. Ingredients in the correct combination would confer beneficial potion effects with no downside, or additional negative status effects. In order to brew something using the original method, the player would have had to move items from their inventory into the crafting grid of a Cauldron.

Complete recipe list
Currently there are lots of ingredient combinations, the exact number is still unknown.