Rich, slightly bitter tree nut with earthy flavor. Popular in baking, salads, pesto, and snacking.
Substitutes
Pecan — 1:1 (by volume, direct swap in any recipe). The classic nut swap. Pecans at 72% fat are sweeter and less bitter than walnuts at 65% fat [USDA]. Walnuts contain bitter tannins in their skin that pecans lack [McGee]. Pecans work perfectly in every walnut recipe — baking, salads, toppings, and granola — with a milder, butterier result.
Almond — 1:1 (by volume, almonds hold shape better when baked). Almonds have 21g protein and 49% fat versus walnuts at 15g protein and 65% fat, making them firmer and less oily [USDA]. Walnuts are rich in polyunsaturated omega-3 ALA while almonds are predominantly monounsaturated [USDA]. Almonds are milder, crunchier, and work in most walnut recipes.
Brazil Nut — 1:1 (by weight, chop brazil nuts to walnut size). Brazil nuts are the world richest food source of selenium at 1917 micrograms per 100g — over 3000% daily value [USDA]. At 67% fat they are creamier than walnuts at 65% fat. Chop to walnut size for even distribution; limit intake to 2-3 nuts daily due to extreme selenium content [FDA].
Hazelnut — 1:1 (by weight, chopped or whole, toasted preferred). Hazelnuts are slightly sweeter and less bitter than walnuts, making them excellent in baking and desserts. Walnuts contain 15g protein and 65% fat, predominantly polyunsaturated alpha-linolenic acid (omega-3), with bitter tannins concentrated in their skin [USDA]. Hazelnuts have a more aromatic profile from filbertone and pair classically with chocolate [McGee]. Toast hazelnuts and remove skins to best replace walnuts in brownies, banana bread, and salads.