Drain the chickpeas in a strainer over a bowl, reserving the chickpea liquid for another use if desired. Rinse the chickpeas and add to a food processor. Add the cashew butter, maple syrup, almond milk, oats, espresso powder, vanilla, cinnamon, cardamom, clove and nutmeg. Puree until smooth, about 1 minute.
The hummus can be served room at temperature immediately or chilled. To serve, transfer the hummus to a large mug, top with a dollop of yogurt, if using, a sprinkle of cinnamon, cardamom and salt. Garnish with a cinnamon stick, if using, to resemble a latte. Serve with graham crackers, cinnamon pita chips or apple slices.