Slow Cooker
- Add all ingredients to the slow cooker. Stir to mix well.
- Cook HIGH 2 hours or LOW 4.
Instant Pot
- Add all ingredients to the Instant Pot. Stir to mix well.
- Close lid and seal valve. Set high pressure for 3 minutes. When done, natural release 5 minutes then quick release any remaining pressure.
Optional final step: Strain the latte through a fine-mesh strainer to remove the sediment from the latte.