⭐ Crème fraîche (Best Nut-Free Option)
1:1 by volumeCrème fraîche is a cultured cream with a fat content typically around 30-40%, higher than sour cream's 20%. This higher fat content stabilizes the emulsification process in Béarnaise sauce, preventing separation and providing a smooth, velvety texture. Its mild tang complements the tarragon and vinegar base without overpowering.
For best results, add crème fraîche off heat or at very low heat to avoid breaking the emulsion. Stir gently and avoid boiling the sauce after addition.
Compared to sour cream, crème fraîche yields a richer, silkier sauce with a slightly less sharp tang, enhancing the luxurious mouthfeel of Béarnaise.