Increase heat to medium and continue cooking until custard thickens, about 5 minutes longer. When it begins to bubble, set timer and continue whisking for 90 seconds. This step is important to neutralize starch-dissolving protein found in egg yolks. Off-heat, stir in vanilla extract and season to taste with additional vanilla, salt, or cloves, as needed. If desired, strain custard through same sieve as before (again, no need to wash) to remove bits of chalazae that may remain or any accidentally curdled custard.
Published at Thu, 10 Jan 2019 10:28:27 +0000