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Light, Dark or Blackstrap Molasses - Which Do You Need? Understanding the Differences

Updated on April 25, 2009

Sugar Cane

Blackstrap, first pressing, sulfured, unsulfured…what kind of molasses do you need, and what's the difference anyway? Who knew buying the molasses you needed for those cookies or baked beans could be so hard!

How is Molasses Made?

Molasses is a by-product in the manufacture of sugar, mostly from sugar cane or sugar beets. To make sugar, sugar cane is pressed to extract all of its sweet juices, leaving behind only a woody pulpy bit of cellulose. These juices are brought to a boil and the sugar contained within starts to crystallize – and it is removed. Not all of the sugar in the syrup can be extracted, and the syrup that remains after the extraction process is molasses.

Different Grades of Molasses?

The sweet liquid pressed out of the sugar cane is processed (boiled) three times, and syrup that remains after each boiling is molasses.

Light Molasses

The first boiling of the cane syrup leaves the lightest colored molasses, called light or amber molasses, or first press molasses. This molasses has a sugar content of about 65% and is the lightest in taste and also in appearance. This molasses is suitable for baking but can also be used as a table syrup.

You can generally substitute light molasses for darker varieties, but darker varieties cannot be substituted for light molasses…don't try pouring blackstrap on your waffles!!

Medium or Dark Molasses

If the syrup remaining after the first boiling is not sold as light molasses, it is boiled again to extract more sugar. The syrup that remains after this second extraction boiling is called dark molasses and it is darker and fuller tasting than light molasses, with a sugar percentage of about 60%.

You can generally interchange light and dark molasses in recipes.


What's left over after a third boiling and extraction is called blackstrap. It contains about 50-55% sugar and is less sweet and far more flavorful (bitter) and robust than either medium or dark molasses. It is used in the cooking of certain cookies, and famously in Boston Baked Beans, and it is an incredibly healthful form of sweetener.

Blackstrap molasses concentrates many of the nutrients found naturally in sugar cane and is an excellent source of iron, calcium, manganese and Vitamin B and E, as well as many trace minerals. One spoonful of blackstrap is said to have as much iron as 9 eggs, and more calcium than a full glass of milk.

Sulfured or Unsulfured?

When unripened cane (green cane) is used to make sugar, the molasses is infused with sulfur as a preservative. When ripe sugar cane is used, no sulfur is needed.


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    • profile image

      Holly M 7 years ago

      Thank you, this was very helpful.

    • profile image

      hollybug82 7 years ago

      how can u dilate the reg molasses? my recipe calls for light molasses & I cant seem to find any...

    • fishskinfreak2008 profile image

      fishskinfreak2008 9 years ago from Fremont CA

      Very useful information. Now I know some of the differences between molasses and chocolate

    • DiamondRN profile image

      Bob Diamond RPh 9 years ago from Charlotte, NC USA

      We were raised in the Southern part of the United States using Black Strap Molasses. It was a lot cheaper than Maple Syrup. It is a part of our heritage. A little bit goes a long way. I recently bought a jar just for the memories. Bob

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      Jim McDosh 9 years ago

      Wow thanks for enlightening us on that suibject!