4 cups granulated sugar
1 cup light (not dark) corn syrup
1 cup water
1/4 tsp salt
3 egg whites (room temperature)
1 cup walnuts, chopped
1 tsp vanilla
Combine sugar, corn syrup, water, and salt in heavy saucepan. Cook and stir over medium heat until mixture starts to boil. Continue cooking until mixture forms soft ball when tested in cold water (or use a thermometer).
Continue to cook remaining syrup while beating egg whites, until syrup reaches the light crack stage when dropped in cold water (this will happen quickly). Pour remaining syrup over egg white mixture, beating all the while. Continue beating until candy begins to hold its shape. Stir in vanilla and nuts and food coloring. Drop by teaspoonfuls onto waxed paper.