Combine apple juice, brown sugar, salt, and cinnamon in a small saucepan. Whisk together and heat over low until well blended. Let the mixture boil for 10 minutes.

Pour half of the mixture into a jar and let it cool, this will be your sweetener.

Boil down the remaining mixture for 5-7 minutes until it coats the spoon evenly. Pour into a saucer and set aside, this will be your topping.

Heat up your favorite plant-based milk and whip it until it's foamy.

Pour the sweetener into the bottom of your mug, followed by the whipped milk. Slowly pour the espresso into the center of the mug. Drizzle the topping over the foam and serve immediately.