ersatz horchata

Here’s a recipe for fake-but-tasty horchata. For the real deal, look elsewhere. For something quick, single-serving:

In a medium jug or bowl, whisk together 250 ml rice or oat milk, a generous pinch of cinnamon, a drop of vanilla essence, and 1/2 tsp brown sugar (or to taste). Whisk until the sugar is dissolved. For a more pervasive cinnamon flavour, allow to rest for 1 hour and then whisk again. Serve over ice, with a little spoon to keep stirring.

Is there a a cocktail to be made from this, with dark rum or tequila?

Holy cow, see the Wikipedia article. Had no idea that horchata is such a widespread thing, and with so many different methods.