Cinnamon Rock Candy

1 cup water
3 3/4 cups granulated sugar
1 1/4 cups light corn syrup
1 teaspoon red liquid food coloring
1 teaspoon cinnamon oil
1/3 cup confectioners' sugar

Line a 15 x 10-inch baking pan with foil and butter the foil; set aside.

In a large heavy saucepan, combine water, sugar, corn syrup and food coloring. Bring to a boil over medium heat, stirring occasionally. Cover and cook for 3 minutes to dissolve sugar crystals. Uncover; cook on medium-high heat, without stirring, until a candy thermometer reads 300 degrees F (hard crack stage), about 25 minutes.

Remove from heat; stir in cinnamon oil. Immediately pour into prepared pan. Cool completely, about 45 minutes. Break into pieces using the edge of a metal mallet. Sprinkle both sides of candy with confectioners' sugar. Store in airtight containers.