Thick, Rich Hot Fudge Sauce

I like using 3 kinds of chocolate, to make a really rich sauce. This sauce becomes very fudgey, almost chewy, when it comes in contact with the ice cream. If you prefer a thinner sauce, increase the amount of cream.

Ingredients:
2Tbl. real butter
1/2cup heavy cream
2Tbl. dark-chocolate cocoa powder
pinch of salt
1/4cup sugar
1/3 cup semisweet chocolate chips
2/3cup milk chocolate chips
1/2tsp. vanilla

Preparation:
Whisk together, the butter, cream, cocoa, salt, and sugar in a heavy saucepan.
Heat on high, whisking constantly, bring to a boil. Continue to boil 1 minute or until it thickens slightly.
Remove from heat and add both kinds of chocolate chips, and the vanilla.
Whisk until well blended. It's ready to use.
Store covered in the fridge. Reheat in the microwave, before using.