1/2 cup cocoa powder
1 cup sugar
1 cup water
1/4 teaspoon salt
1 teaspoon vanilla extract
2 tablespoons butter
Whisk cocoa powder, sugar, and salt in a saucepan
Add water and whisk until smooth
Place over medium heat
Stir constantly until the mixture begins to simmer
Reduce heat and cook for 2 to 3 minutes
Remove from heat
Stir in vanilla extract and butter
Let cool slightly before using
Store in a sealed container in the refrigerator