• 1 1/4 tsp. fleur de sel
To prepare budino: In a large bowl or pitcher, combine cream and milk and set aside. In a medium bowl, whisk together egg, egg yolks and cornstarch and set aside.
In a large heavy-bottomed pot over medium-high heat, combine brown sugar, 1/2 cup water and salt. Let sit until edges start to brown, then tilt pot as needed to even the browning until mixture becomes a smoking, dark caramel, about 10 to 12 minutes. Sugar will smell caramelized and nutty and turn a deep brown.
Immediately whisk cream mixture carefully into the caramel (the mixture will steam and the sugar will seize). Reduce heat to medium, whisk until caramel is smoothly incorporated into cream and bring mixture to a rapid boil.