01 -
Cover the inside of a 9-inch square pan with parchment. Makes it much easier to lift later.
02 -
Toss your white chocolate chips, marshmallow fluff, and dry cake mix into one big bowl. Let it sit for now.
03 -
In a pot, mix butter, cream, sugar, and a pinch of salt. Stir it over medium heat till you see bubbles.
04 -
Once it’s bubbling, start timing 4 minutes. Don’t stop stirring—keep going the whole time.
05 -
Carefully pour the hot mixture over the bowl of chocolate and cake mix. Use a mixer on low for about a minute until it’s smooth, then gently mix in most of the sprinkles.
06 -
Spread the mixture into your pan quickly, then sprinkle the rest of the rainbow sprinkles on top.
07 -
The tough part—leave it alone for 4 hours so it can firm up completely.