Grease a cookie sheet, and/or line it with parchment paper. Set aside.
Prepare the apples: Remove all stems and stickers (if applicable). Insert stick into apple – They should go in at least halfway. Set aside.
In a heavy saucepan, combine sugar, corn syrup, and water. Stir well, bring to a boil on medium or medium-high heat. Affix candy thermometer to pan.
Boil mixture, stirring occasionally, until it reaches 310 degrees. Remove from heat, quickly stir in food coloring and flavoring. Stir mixture until it stops boiling, and most of the “bubbles” disappear – this will minimize texture on your finished coating.
CAREFULLY dip each apple, one at a time, turning to coat completely & evenly. Allow excess candy to drip into the pan, then place on prepared cookie sheet. Be VERY careful – sugar burns are NOT fun! Leftover sugar syrup can be used to make Homemade Jolly Ranchers
Allow candy coating to cool completely – usually 30-45 minutes. Remove from cookie sheet and enjoy, or wrap in cellophane to enjoy later.