01 - 
                Line a baking sheet with parchment paper and lightly grease it with oil.
              
              
              
                02 - 
                In a heavy saucepan, mix the sugar, corn syrup, water, and cream of tartar. Stir over medium heat until the sugar dissolves.
              
              
              
                03 - 
                Increase the heat to medium-high. Let the mixture boil without stirring until it reaches 300°F to 310°F, about 7-10 minutes.
              
              
              
                04 - 
                Remove from heat. Carefully stir in the orange zest, orange extract, and food coloring if using.
              
              
              
                05 - 
                Pour the mixture onto the prepared baking sheet. Spread into a thin layer with a heat-resistant spatula.
              
              
              
                06 - 
                Allow the candy to cool completely. Break into pieces by tapping with a hammer or the back of a spoon.