Here it is, the step by step way to make easy homemade butter. Warning: This IS delicious. Make at your own risk.
You will need:
Heavy whipping cream (I buy the biggest carton for about a pound of butter)
An electric mixer (This is the "easy" part)
2 large bowls (1 for mixing and the other to put under the strainer)
Pour the whole carton of whipping cream into bowl #1. I have a stand mixer but a hand one is fine as long as you don't mind holding it for a while. After you have poured all the cream into your bowl turn your mixer on medium high speed. Be careful because it will splash a bit.
After a while of mixing, it will get a whipped cream consistency. You should be able to lift the mixers and get a peak from the cream. This is a good sign so continue mixing on medium high.
The cream will start to get a grainy texture and turn a pale yellow color. Keep mixing on medium high.
After a while of mixing the cream will start separating. The hard part will be your butter curds and the liquid is buttermilk. Be careful because it will start splashing again. Continue mixing until the buttermilk is completely separated from the butter curds.
Take your 2nd bowl and place the strainer on top. Pour the buttermilk and curds into the strainer to separate them. Make sure the strainer is high enough above the bowl so that when you drain the buttermilk it does not touch the bottom of the strainer. Knead the butter (yes with your hands) while in the strainer to squeeze out any excess buttermilk.
Once the butter curds are free of the buttermilk and is kneaded you have butter! If you want to add salt keep reading. And if you want unsalted butter store in an air tight container and keep refrigerated.
Step 7 (If adding salt):
Put your butter on a plate and add a small amount of salt. This is just for taste. Gradually add as much as you want to get it to your liking. I suggest to stop and taste as you go so you don't put too much in. Once you're finished store in an air tight container and keep refrigerated.
Well look at you! Aren't you just so proud of yourself. You made butter. What will you possibly do next?!
Oh, and the easy part was using an electric mixer. But if you have lots of time and want biceps of steel then you can put the cream in a jar and shake it. The jar option is also good if you want to do a little food project with kids. It makes it fun for them. You can also keep the buttermilk and use it in another recipe!