Martha Stewart offers an easy recipe for red candy apples on her website, MarthaStewart.com. An instructional video of the celebrity chef preparing the candy apples accompanies the recipe.
To make red candy apples, begin by lining a baking sheet with parchment paper and buttering the parchment. Set the sheet to the side.
Combine 2 cups of sugar, 3/4 cup of water, 1/2 cup of light corn syrup and 1/2 teaspoon of red food coloring in a medium-sized heavy-bottomed saucepan. Over high heat, bring the mixture to a boil, and then reduce the heat to medium-high. Clip a candy thermometer on the side of the pan, and allow the mixture to boil until it reaches hard-crack stage at 300 to 310 degrees Fahrenheit, which generally takes around 20 minutes.
While the mixture cooks, insert wooden sticks into the tops of six medium-sized or 12 small apples. Push the sticks halfway through the apples, and set the apples to the side.
Once the mixture reaches hard-crack stage, remove it from the heat, and quickly and carefully dip each apple in the mixture, coating the apples entirely. Move each apple to the prepared parchment-lined baking sheet after dipping, and allow the apples to cool prior to serving them.