Homemade Rainbow Chip Frosting

Bahan-bahan (2 porsi)

• 6 ounces (170g) pure white chocolate, coarsely chopped*
• food coloring: red, green, yellow, blue
• 3/4 cup (12 Tbsp; 170g) unsalted butter, softened to room temperature
• 6 ounces (170g) full-fat brick cream cheese, softened to room temperature
• 3 and 1/2 cups (420g) confectioners’ sugar
• 1 and 1/2 teaspoons pure vanilla extract
• salt, to taste