Melt chocolate with water over low heat. Simmer for 3 minutes. Remove from heat and stir in the honey and butter. Beat well until smooth. Pour it over ice cream or cake.
Add 2 tablespoons of sauce to a glass of warm milk and stir.
Store in an airtight jar. It will keep in the fridge for a week or more. Reheat gently but do not boil if you want the sauce warm again.
"It's like this," he said. "When you go after honey with a balloon, the great thing is not to let the bees know you're coming." -- Winnie-the-Pooh.