Mornay Vs Hollandaise Sauce: What's The Difference? - Tasting Table
Briefly

Mornay and hollandaise sauces, two notable French sauces, share similarities in texture and flavor but diverge significantly in ingredients. Mornay sauce is crafted from a béchamel base enhanced with Gruyère cheese, resulting in a creamy, cheesy addition to many dishes. In contrast, hollandaise is made with egg yolks, butter, and lemon juice, giving it a bright, buttery flavor profile. While both sauces are used warm and have neutral tastes, their distinct characteristics and applications make them unique within culinary practices, with mornay often serving as a hollandaise substitute.
Mornay sauce, a luxurious French cheese sauce, is essentially béchamel with the addition of Gruyère, creating a savory cheesy accoutrement for dishes.
Hollandaise is known for its rich, buttery flavor balanced by lemon acidity and a hint of cayenne pepper, distinguishable from mornay's cheesy profile.
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