Blackstrap molasses is just one of a few types of molasses Aunt Patty's offers. This is the dark liquid byproduct of the process of refining sugar cane into table sugar. Blackstrap Molasses is made from the third boiling of the sugar syrup and is therefore the concentrated byproduct left over after the sugar's sucrose has been crystallized. Blackstrap therefore contains significant amounts of a variety of minerals. The nutrients in which it is concentrated include manganese, copper, iron, calcium, potassium, magnesium, vitamin B6, and selenium.