Identify what you’re using cornmeal for: polenta/grits texture, batter thickener, or a crumb/crust for frying.
Pick the closest texture match from the table (fine for batter, semolina for scoopable polenta, crumbs for coatings).
Apply the ratio from the WPRM list; for wetter batters, whisk longer to prevent clumps.
Adjust by texture: if it’s too thick, add liquid 1–2 tablespoons at a time; if too loose, add small amounts gradually.
Taste and re-check after the first cook step (baking/frying simmer/heat) because some substitutes firm up as they cool.