Grease 9x13 pan with butter. Combine first 5 ingredients in heavy saucepan. Cook over medium jeat stirring constantly until mixture reaches 234 degrees on a candy thermometer. This will take 15-20 minutes. Mixture will turn from pale yellow to golden brown. Stir in anise extract and enough black food coloring to make caramel dark black. Pour mixture in buttered pan and let cool.
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