01 -
Slice the vanilla bean lengthwise and scrape out the seeds. Heat the milk with both the bean and seeds until it boils, then take it off the heat.
02 -
Whisk the eggs together with the sugar until the color lightens. Gradually mix in the flour to avoid any lumps.
03 -
Remove the vanilla bean from the milk, then slowly pour the warm milk into the egg mixture, whisking as you go.
04 -
Pour everything back into the pot. Cook over medium heat, whisking constantly for about three minutes after it starts boiling, until it thickens.
05 -
Once off the heat, whisk it one last time to make it smooth. Let it cool to room temperature before refrigerating until you’re ready to use.