Mocha Fudgsicles

Name: Mocha Fudgsicles
Ingredients: 1-½ ounce, weight Dark Chocolate, Chopped; ½ cups Granulated Sugar; 1-½ Tablespoon Cornstarch; 2 Tablespoons Unsweetened Cocoa Powder; 1-½ cup Milk (I Used 2 %); ½ cups Strong Brewed Coffee; ½ teaspoons Kosher Salt; ¾ teaspoons Vanilla; 2 teaspoons Unsalted Butter