Line a baking sheet with parchment paper and spray it lightly with cooking spray. Insert craft sticks into the top of each apple.
In a heavy-bottomed saucepan, combine sugar, water, and corn syrup. Stir over medium heat until the sugar dissolves.
Increase heat to high and bring the mixture to a boil. Cook without stirring until the candy thermometer reads 300°F (hard crack stage).
Remove from heat and quickly stir in red food coloring.
Dip each apple into the hot candy mixture, swirling to coat evenly. Let excess drip off.
Place the coated apples on the prepared baking sheet and allow them to set for about 30 minutes.
Once hardened, enjoy immediately or wrap in parchment for later!