An ingredient that many people forget can be quite useful if you are in a difficult pinch. Many newcomers to the world of Minecraft are often unaware of the fact that this liquid can be useful for far more than just a baking ingredient.
Before you can get your milk you need to get a bucket so that you can harvest and hold the resource.
You can make a bucket by going to your creation menu and then put three iron ingots together. After that has been accomplished you just need to find a cow and the rest should be easy.
To get your cow, it is highly recommended that you get some wheat to convince the animal to follow you so that you can then seal it off into a fence or building, depending on where you would prefer to hold your animals.
Now that you have a steady source of milk you can then harvest the resource from the cow by pressing the use button on the animal which should grant you a filled milk bucket.
As far as food is concerned you can use the milk you have obtained you can then use this ingredient to make a food item that can restore a great deal of your hunger meter should you consume all of its slices. This food item is the cake and below are the list of ingredients you would need to make such an item:
Consuming one slice of cake can fill up two hunger bars. Eating all seven can fill fourteen hunger bars, making it a very useful food item to have on hand.
A use for milk that goes beyond baking however is how it can assist you with negative status effects. If you were to press the use button whilst holding a bucket of milk you would drink all of the contents of the item and reap the benefits all the while.
When consumed any status effects, good or bad are removed from the player giving you a fresh new start with the state of your character. This of course will not affect the player if they are in area of effect items that grant continuous status effects like Beacons, Conduit Power, or Hero of the Village, so take care to use this unique property of milk wisely and not to your detriment. You should take care to not use milk whenever you have positive status effects that can assist you in a fight or else you may find yourself at a severe disadvantage.
Also keep in mind that fire does not count as a status effect, so trying to use milk to put out the fire on you would be a very moot action.
Milk is a surprisingly useful item that can offer you a great deal of utility when going up against foes that can put severe debuffs on you. Harvesting such an item consistently so that you can use it efficiently is something that should definitely be prioritized by those who will use poisons or other nasty status effects against you.