Begin by brewing a strong cup of coffee, around 2 cups, and pour it into a mixing bowl. While the coffee is still hot, add in the sugar and stir well until it's completely dissolved.

Add ½ cup of 1/2 & 1/2 or cream, ½ cup of milk, and 1 teaspoon of vanilla extract to the sweetened coffee mixture. Whisk everything together until it's smooth and fully combined.

Pour the blended coffee mixture into a freezable container or ice cube trays. Spread it out evenly and place it in the freezer. Allow it to freeze for at least 4 hours.

Once frozen, take the container out of the freezer and let it sit at room temperature for about 5–10 minutes.

Using an ice cream scoop, portion out the coffee slush into chilled glasses, topping each serving with a swirl of whipped topping.