01 - Line a baking sheet with parchment paper and lightly grease the surface. Insert one wooden stick firmly into each apple’s stem. Set apples aside.
02 - Combine granulated sugar, light corn syrup, and water in a medium heavy-bottomed saucepan. Stir gently, then bring to a boil over medium-high heat. Do not stir during boiling.
03 - Continue cooking mixture until it reaches 300°F (150°C) on a candy thermometer, approximately 10–12 minutes.
04 - Remove saucepan from heat. Quickly whisk in heavy cream, unsalted butter, vanilla extract, and black gel food coloring until the mixture is smooth and evenly colored. Exercise caution as the caramel may bubble up.
05 - Tilt the pan and, working rapidly, dip each apple into the black caramel, rotating to coat evenly. Allow excess caramel to drip off, then place apples on the prepared parchment-lined baking sheet.
06 - Let caramel-coated apples stand at room temperature for at least 20 minutes before serving.