Here's a recipe I use for Milk Chocolate Frosting - I don't see why you couldn't follow the same method with your ingredients.
MILK CHOCOLATE FROSTING
1/2 cup heavy cream
pinch table salt
1 tablespoon light corn syrup
10 ounces milk chocolate, chopped
1/2 cup confestioner’s sugar
8 tablespoons unstalted butter, cold, cut into 8 pieces
Heat cream, salt, corn syrup in microwave-safe measuring cup on high til simmering, or bring to a simmer in a small pain over medium heat. Place chocolate in workbowl of food processor fitted with steel blade. With machine running, gradually add the hot cream mixture through the feed tube; process 1 minute after cream has been added. Stop machine; add confectioners’ sugar and process to combine, about 30 seconds. With machine running, add butter through feed tube one piece at a time; process til incorporated and smooth, then about 20 seconds longer. Transfer frosting to a bowl and cool at room temp, stirring frequently, til thick and spreadable, about 1 hour.