Butter is made from churning fresh cream or milk. The churning process causes the milk solids/fats to conjoin. This results in solid particles of butter which are strained out of the remaining liquid. The liquid is commonly referred to as buttermilk.

The following recipes on this site use butter:

Hot Buttered Rum
butter, brown sugar, water, rum,
Hot Buttered Rum (batter mix)
brown sugar, butter, salt, nutmeg, cloves, cinnamon,