Choose your substitute base from the list above based on whether you want closest corn flavor (polenta) or the smoothest spoon texture (cream of wheat).
Start with the same ratio mindset (use the listed substitute ratio), then add warm liquid gradually until you reach a thick, spoon-coating consistency.
Cook at a gentle simmer, stirring often; when it starts to pull from the pot edges, remove heat and rest 1 minute to thicken.
Season immediately while hot (salt, butter, and any savory additions), because thickness affects how flavors taste once served.