01 - Line a baking sheet with parchment paper. Insert popsicle sticks or sturdy skewers into the base of each apple wedge. Brush the cut sides lightly with lemon juice to minimize browning.
02 - In a heavy saucepan, mix granulated sugar, light corn syrup, water, and cream of tartar. Heat over medium, stirring until sugar has dissolved.
03 - Bring the mixture to a boil without stirring further. Allow syrup to reach 300°F (150°C) on a candy thermometer, approximately 8 to 10 minutes.
04 - Remove saucepan from heat. Stir in chosen food coloring and vanilla extract until evenly combined.
05 - Working rapidly, dip each apple wedge into the hot candy coating, letting any excess drip off. Arrange on the prepared baking sheet.
06 - While the coating remains unset, immediately decorate slices with chocolate chips, nuts, or sprinkles as desired.
07 - Allow coated apple wedges to cool and harden fully at room temperature before serving.