A basic recipe for Turkish Delight includes sugar, water, lemon juice, cornstarch and cream of tartar. Turkish Delight also incorporates rosewater, powdered sugar and food coloring.
To make Turkish Delight, line a 9-inch baking pan with foil and set it aside. Combine 4 cups of sugar with 1 1/2 cups of water and 2 teaspoons of lemon juice over medium heat, stirring until the mixture dissolves. Bring the mixture to a boil, scraping down the sides of the saucepan regularly to avoid sugar crystals. Use a candy thermometer to watch the temperature until it reaches 240 degrees Fahrenheit.
While the sugar mixture comes to a boil, start preparing the rest of the ingredients. Combine 3 cups of water with 1 1/4 cup of cornstarch and 1 teaspoon of cream of tartar. Whisk the mixture over medium heat until it becomes a thick, well-dissolved paste. Once the sugar mixture reaches 240 degrees, slowly add it to the cornstarch mixture, stirring constantly to make sure that it incorporates completely.
Cook the mixture over low heat for an hour. Whisk it every 8 to 10 minutes until the candy achieves a pale golden color. Stir in the rosewater and the food coloring and then pour the candy into the prepared pan to set overnight. In the morning, cut the candy into small squares and dust each square in powdered sugar to prevent sticking.