Place a sheet of plastic wrap directly on surface of mixture (to prevent a film from forming); chill about 3 hours or until thick. (myrecipes.com)
Beat egg yolks with a handheld mixer in a medium bowl at high speed 4 to 5 minutes or until yolks become pale and ribbons form on surface of mixture when beater is lifted. (myrecipes.com)
The mixture should fall from the spatula in long, thick ribbons, like slow - flowing lava, and the surface of the mixture should smooth out within 30 seconds. (thefoodielovers.com)