01 - Rinse the rice under cold water until the water runs clear, then drain thoroughly.
02 - Combine whole milk, heavy cream, unsalted butter, and salt in a medium saucepan. Heat over medium until it reaches a gentle simmer.
03 - Stir in the rice, reduce heat to low, and cook uncovered, stirring occasionally, for 25 minutes until the rice is tender and the mixture is thickened.
04 - Incorporate the sugar, ground cinnamon, and vanilla extract. Continue cooking for an additional 5 to 7 minutes, stirring frequently, until creamy.
05 - Remove from heat and allow to cool slightly; the pudding will thicken further as it cools. Spoon into bowls and garnish with extra cinnamon. Serve warm or chilled.