In a measuring cup, whisk ½ cup milk and the cornstarch until smooth.
3 1/2 cups whole milk, 5 Tablespoons cornstarch
In a pot over medium heat, add the remaining milk, heavy cream, cornstarch slurry, and sugar, mixing to combine.
1/2 cup heavy whipping cream, 1/2 cup granulated sugar
Increase the heat to medium-high, bringing the mixture to a boil and whisking continually.
Once the pudding thickens, remove it from the heat, and stir in the vanilla.
2 teaspoons vanilla extract and/or vanilla bean paste
Transfer the Muhallebi to small goblets or serving bowls. Spoon the chilled Amardeen on top.
Chill in the fridge for 1-2 hours. Garnish with coconut flakes and nuts, if desired.
Optional: coconut flakes and chopped nuts for garnish
Store in the fridge for 1-2 days.