Brownies and blondies are two such desserts, made with the same base of butter, sugar, flour, salt, and eggs, cooked in the same type of pan, and sliced into the same square servings. Yet ...
Classic blondies get a boost with brown butter ... then butter it; when the brownies are cool, lift them from the pan using the paper as a sling, peel off the parchment or foil, then set them ...