4 oz. whipping cream
3 tbsp. butter
1/3 c. granulated sugar
1/3 c. dark brown sugar, firmly packed
Pinch of salt
1/2 c. cocoa powder

Melt butter in cream over low heat. Stir until cream comes to low boil. Add sugars and stir until dissolved. Add salt and cocoa powder; stir until smooth. Remove from heat. Serve immediately or reheat slowly, stirring frequently.