Do you mean sorghum syrup or flour? I think you mean syrup as you mention molasses in your intro but just wanted to check. Thanks!

I made this cake and I couldn't find sorghum syrup anywhere, so I used molasses for all - it was still fantastic! I did find Lyle's golden syrup and I may use that next time.

Since the Sorghum is listed with the wet ingredients, I think it is liquid sorghum. Generally, when a recipe calls for sorghum it is liquid, as that's its most common form. Sorghum flour is usually listed as such.