Eggs Benedict

The heat is too high. Hollandaise is an emulsion that breaks when it gets too hot (above 160°F for finished sauce). Keep the heat very low, add the butter slowly in a thin stream while whisking constantly, and remove the saucepan from direct heat if it begins to feel hot to the touch. If it breaks, start over with a fresh yolk and slowly whisk in the broken sauce until it re-emulsifies.

Use very fresh eggs (the yolk and white will be more compact) and the gentlest possible simmer, around 180–190°F. Some cooks swirl the water with a spoon before adding the egg, creating a whirlpool that keeps the egg together, though this is optional. Simmer a small cup first to cool the temperature to the right point before sliding the egg in.

Yes, you can make it up to 1 hour ahead and keep it warm in a bowl set over warm water, whisking occasionally. Cover the bowl loosely so steam can escape. If the sauce thickens as it sits, whisk in a few drops of warm water or lemon juice to loosen it back to pourable consistency. Do not refrigerate and reheat hollandaise; it will break. Always make fresh or keep it warm.

Smoked salmon, a crispy slice of bacon, sautéed spinach (making it 'Eggs Royale' or 'Eggs Florentine'), or sliced tomato all work well as variations. The key is that the topping should be warm, flavorful, and thin enough that it does not interfere with folding or eating.

You can soft-boil eggs (6 minutes in simmering water from cold) and substitute them for poached eggs, though the result is slightly different. Baking or microwaving eggs does not produce the same silky, runny yolk, so traditional poaching is best. If you lack a shallow pan, use a wide sauté pan or even a large skillet.

Technically possible but not recommended—the components deteriorate separately. If you must, store the English muffin and Canadian bacon together in the refrigerator (up to 2 days), store the poached eggs separately in an airtight container (up to 1 day), and store the hollandaise separately (up to 1 day). To reheat, toast the muffin, warm the bacon in a skillet, gently reheat the poached eggs in barely simmering water for 1 minute, and serve with fresh warm hollandaise (do not reheat old sauce).