In a blender, combine the vanilla ice cream, whole milk, cashew butter, and sea salt. Tip: For a thicker shake, use frozen ice cream straight from the freezer.

Blend on high speed until smooth and creamy, about 30-45 seconds. Tip: If the shake is too thick, add a splash more milk.

Pour the milkshake into two tall glasses. Tip: Chill the glasses beforehand for an extra frosty treat.

In a small bowl, melt the dark chocolate chips with coconut oil (if using) in the microwave in 20-second intervals, stirring until smooth. Tip: The coconut oil helps the chocolate drizzle set slightly on the cold shake.

Drizzle the melted chocolate over the top of each milkshake. Tip: Use a spoon or piping bag for precise drizzling.