In a medium saucepan, add in the cocoa powder and sugar. Whisk until all the lumps are out of the cocoa powder.
Add in the white chocolate chips, peanut butter, heavy cream, and milk. Turn the heat on to medium. Whisk to start to incorporate the ingredients. It will come together as the liquid begins to heat up.
Let the hot cocoa heat until it's almost to a boil and small bubbles form around the edges of the saucepan. Whisk vigorously until the hot cocoa is smooth.
Remove from the heat and pour into 2 large mugs.
Place about 2 tablespoons of fluff on top of each mug.
Place the 1/4 cup of peanut butter in a microwave-safe bowl. Microwave for 30 seconds. Using a spoon, drizzle the peanut butter over the fluff. Grab a spoon and give it a swirl. Drink up!
If you feel that the recipe is too rich, feel free to add an additional cup of any kind of milk.