4-5 tablespoon butter
7-9 tablespoon unsweetened cocoa powder
1/4 cup sugar
1/4-1/2 cup milk
2-3 tablespoon corn syrup
1/2-1 teaspoon vanilla
Marinos, an Italian restaurant in Cambridge, serves their tiramisu with a chocolate sauce on the side, this is an approximation I made up.
In top of a double boiler, over boiling water, melt butter and mix with cocoa powder. Once melted and smooth, mix in sugar, keep stirring until smooth. Add milk, and keep stirring until creamy consistency (for a while there it looks like individual bits of chocolate floating in milk, but it does eventually combine.) At this point it’s still quite bitter, so add corn syrup, continue adding corn syrup until desired sweetness. Let it cool and then stir in vanilla.