Bring the Sucanat, agave, and water to boil in a small saucepan,stirring. When it comes to a boil, stop stirring and cook until thick and a deep amber color, 2 to 3 minutes. Whisk the remaining ingredients in a small bowl until perfectly smooth, then carefully add to the saucepan (to avoid splattering). Cook another 3 minutes on a medium flame, whisking. Makes about 2½ cups. Store refrigerated in a glass jar.