Wash and thoroughly dry the apples. Insert the lollipop sticks or popsicle sticks so that they are firmly positioned in the apples. Set the apples aside on a cookie sheet lined with wax paper.
Combine the sugar corn syrup and water in a saucepan over medium heat. Bring it to a boil and cook the mixture until your candy thermometer reaches 300ºF. This is known as the hard crack stage.
Remove the candy mixture from the heat and carefully stir in the black food coloring. Your sugar may bubble up and splash so use caution! The recipe used 1/2 teaspoon of food coloring but you may need more to reach your desired color.
One by one carefully dip the apples into the candy mixture swirling to coat them thoroughly and allowing any excess to drip back into the pan. Transfer the coated apples to the prepared cookie sheet and allow them to cool until the candy has fully hardened. Once your sugar hardens you may find it easier to slice the apple before biting. Enjoy!