Pour the cold brew coffee into an ice cube tray. Freeze until solid. I usually do this a night ahead.
Place the frozen coffee ice cubes, ice cream, milk and sugar into a blender.
Blend until smooth. You might need to add more milk if the shake is too thick.
Top with your favourite toppings such as whipped cream and chocolate sauce.
Notes
Cold Brew Coffee Ice Cubes: You can freeze a bigger batch of cold brew coffee, so that you can make this delicious milkshake or coffee slushy whenever you want.
Ice cream: You can also change up the flavors by using coffee ice cream or chocolate ice cream.
Milk: For the creamiest results, I like to use whole milk. But you can use any type of milk.
Storage: This milkshake is best enjoyed immediately.