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Grain Sorghum and Sweet Sorghum
If you have ever seen a gluten-free beer criticised for being "made from sorghum syrup", this page is the distinction behind that criticism — and the reason it does not apply to malted grain.
The two crops
Both are Sorghum bicolor. Breeding sent them in opposite directions: one puts its energy into a starchy seedhead, the other into sugar in the stalk.
| Grain sorghum (milo) | Sweet sorghum | |
|---|---|---|
| Bred for | A large, starchy seedhead on a short stalk | Soluble sugar in tall, juicy stalks |
| What you harvest | The grain | The stalk |
| What it becomes | Malt, flour, grits, feed | Pressed juice, boiled down to syrup |
| The sugar situation | Starch, locked in the endosperm — it has to be gelatinized and converted | Sugar already free in the juice — around 12–22%, depending on variety |
| Needs enzymes? | Yes. Starch is not fermentable until something converts it | No. The sugar is already sugar |
| Our use for it | Everything on this site | None |
Forage sorghums and broomcorn are further types of the same species, bred for biomass and for brush fibre respectively. The point is the same: "sorghum" names a species, not an ingredient.
Why sweet sorghum makes syrup and grain sorghum cannot
Sweet sorghum stalks are milled much like sugar cane, and the juice is boiled down hard: about eight gallons of juice make one gallon of syrup.1 Getting the juice out is the inefficient part — studies of the common press type recover typically less than half of what is in the stalk.2
Nothing in that process is brewing. There is no steeping, no germination, no kilning, no mash, and no conversion step, because there is no starch to convert. It is closer to making maple syrup than to making malt.
Grain sorghum cannot be run through it at all. Its sugar is not in the stalk; it is starch inside the seed, and the only way to a fermentable wort is the long way — malt the grain, gelatinize the starch, and give conversion an enzyme source. That is the entire subject of the brewing process section.
Sorghum syrup is often called "sorghum molasses", which muddies a third thing. Molasses is a by-product of refining cane or beet sugar. Sorghum syrup is the whole evaporated juice, not a by-product of refining anything. Neither is malt.
Why this matters for what you buy
Three different products can all end up shortened to the word "sorghum" on a label or in a conversation, and only one of them is ours:
| What it says | What it actually is | Malt involved? |
|---|---|---|
| Sorghum syrup | Evaporated sweet-sorghum stalk juice | No |
| Sorghum extract | Extract from unmalted grain | No |
| Malted sorghum extract | Concentrated wort from sorghum malt | Yes |
That middle row is what much early gluten-free beer was actually built on, and it is why the category earned a reputation for thin, one-note beer: a fermentable with no malt behind it contributes sugar and very little else. It is a reputation this site spends most of its pages arguing against — see where to get sorghum malt, which is blunt about how easy the wrong one is to buy and how hard the right one is.
The word that settles it is wort. Only malt makes wort. A syrup pressed from a stalk is not wort, and an extract from unmalted grain is not wort. When we describe what Bard's brewed from, we say malted sorghum extract — concentrated wort from sorghum malt — and we never shorten it, because every shortening lands on one of the other two rows.
What we actually use
Grain sorghum, malted. Nothing on this site is built on sweet sorghum, sorghum syrup, or unmalted grain extract. The distinction runs through the whole knowledge base:
- Sorghum Malt — what malting the grain does and why it matters
- Why Sorghum Malt Is the Star — the case for the grain over the shortcuts
- Sorghum Malt Extract — buying the concentrated form, and the supplier questions that tell you which of the three you are being sold
Sources
- Sweet sorghum syrup production, yields and finishing — NCAT/ATTRA, Sorghum Syrup Production.1
- Sweet sorghum as a crop, and how it differs from grain types — NC State Extension, Sweet Sorghum Production to Support Energy and Industrial Products.2
These are agronomy and food-processing sources. They establish what sweet sorghum is and how its syrup is made; they say nothing about gluten-free brewing, and nothing here should be read as their endorsement of any brewing practice.