To make hard tack candy, boil sugar and corn syrup, add flavoring and food coloring, pour the candy into a pan, and then break it into pieces. This candy recipe is vegan and gluten-free.
Put a saucepan over high heat, and clip a candy thermometer to the side. Pour 2 cups white sugar into the pan, and add 3/4 cup corn syrup. Stir the mixture briefly, and wait until it reaches 310 degrees Fahrenheit. Do not stir the candy while it heats. Grease a 9-inch baking pan while waiting.
When the thermometer reads 310 degrees Fahrenheit, pull the pan off the burner. Add 2 teaspoons of your chosen candy flavoring and several drops of food coloring, and then pour the hot syrup into the baking pan. Give the candy several minutes to cool and stiffen, and then cut it into strips with kitchen shears. Leave the strips on the pan until they grow brittle and cool to room temperature.
Break the hardened candy into pieces with your hands. Dredge the pieces in powdered sugar, and remove them with a slotted spoon. Store the candy in a sealed container.
Hard tack candy is a traditional winter favorite, according to the Pittsburgh Post-Gazette. Popular flavorings include lemon, orange, cinnamon, peppermint and butter rum.