Whisk egg yolks, almond milk, natural sweetener and extract (and cocoa powder if using) in medium metal bowl to blend.
Slowly mix in the melted butter so the eggs don't cook unevenly.
Set bowl over saucepan of simmering water.
Whisk mixture constantly and vigorously until thickened and instant-read thermometer inserted into mixture registers 140°F for 3 minutes, about 5 minutes total (or coats the back of a spoon).
Remove mixture from over water. Stir in the Miracle Rice. Add cinnamon to desired taste.
Serve warm or chilled.
(If serving chilled, it can be prepared 1-3 days ahead and refrigerated. Re-whisk before serving.)