Decide how bold you need the flavor: if you want mild, aim for dolce/creamier swaps; if you want punch, choose a stronger blue (roquefort/danish blue).
Choose your substitute and measure with the listed ratio; for crumbly blues, blend briefly with cream cheese or sour cream to match gorgonzola’s spreadable texture.
If your swap is too sharp or salty, reduce the amount slightly and add a small amount of cream/cream cheese to round it out.
If your swap is not tangy enough, add a tiny squeeze of lemon or a dash of vinegar, then taste and adjust before serving.
Use the substitute in the same step as gorgonzola (stir into warm sauces off-heat; melt in casseroles briefly) to avoid breaking texture.