Nappe

Use the spoon test for perfect consistency – Dip a spoon into the sauce, turn it over, and run your finger down the back – if it leaves a clean line that doesn't immediately run back together, you've achieved nappe consistency.

Maintain constant stirring with a metal whisk – Continuous whisking prevents proteins from separating and maintains silky texture, while the metal whisk provides better heat conduction and control than plastic alternatives.

Control temperature precisely for different sauces – Cream-based sauces need medium heat in stainless steel pans, while egg-based sauces like hollandaise require low heat to prevent scrambling, and never use nonstick pans for sauce-making.

Adjust thickness gradually with small additions – If sauce is too thick, add liquid (broth, stock, or water) in small increments; if too thin, create a slurry with cornstarch and cold water, stirring thoroughly and testing consistency frequently.

Add butter or liquid for texture refinement – A few drops of water can loosen an overly thick sauce, while cold butter incorporation (monter au beurre) at the end improves mouthfeel and prevents syrupy texture.