Make the caramel sauce by adding the sugar to a pan over medium-high heat. Stir the sugar for about 1-2 minutes to start to melt.
Whisk in the coconut milk and flaky salt.
Bring to a boil then reduce to a simmer over low medium heat and let it simmer for about 12-15 minutes or until caramel is thick enough to coat the back of a spoon. It will continue to thicken as it cools.
Let cool and then transfer the caramel to a jar with a lid. Caramel can be stored in the fridge for up to 7 days.
Add caramel to the bottom of a mug, the amount depends on your sweetness preference.
Brew a double shot of espresso and add over the caramel.
Froth and steam the oat milk and add to the mug. Drizzle caramel over the top and enjoy!
If you like sweeter coffee, I recommend adding 1 teaspoon of brown sugar syrup. Make it iced by dissolving the caramel into the hot espresso shot before pour over ice cubes and oat milk.