01 -
Mix the melted butter, softened cream cheese, vanilla, and the egg in a large bowl. Keep mixing until it’s all smooth.
02 -
Slowly add parts of the cake mix to the wet stuff, a little at a time. Stir until it all comes together. The dough will feel thick and a bit sticky.
03 -
Stir in the M&Ms and white chocolate chips gently using a spatula. Make sure they’re well spread in the dough.
04 -
Cover your bowl tightly with cling wrap and pop it into the fridge for an hour. Cooler dough is easier to handle and bakes better.
05 -
Set your oven to 350°F (175°C) after the dough has chilled. Line a baking tray with parchment paper to get it ready.
06 -
Scoop out 1-inch balls of dough. Using a cookie scoop or a tablespoon will help make them the same size.
07 -
Put the dough balls on your baking sheet, leaving enough room (about 2 inches) between each one so they don’t run into each other.
08 -
Place in the heated oven and bake for 9–10 minutes. They shouldn’t turn golden on top and may look a little undone in the center, but that’s okay.
09 -
Let your cookies sit on the tray for a few minutes to firm up. Then move them to a wire rack to finish cooling completely.
10 -
Once they’re cool, go ahead and dig in! Or, keep them fresh by sealing them in an airtight container.