In a medium pot, combine the milk and cream over medium heat. Add 90 percent of the sugar to the milk mixture and stir well. Increase the heat to high.
In a bowl, add the egg yolks to the remaining sugar and whisk to combine. When the milk comes to a full boil, remove from the heat and immediately pour the liquid into the eggs slowly while whisking well.
When all the milk has been added, immediately pour the mixture back into the original pot, off the heat. Stir for 5 seconds, then transfer to a container over ice. Cool. Strain as needed, then serve however desired.