Begin by cutting the cold butter into small pieces and add the butter to the bowl of a stand mixer.

Add the white sugar and brown sugar to the bowl as well, and beat until light and fluffy.

Add the eggs and vanilla extract to the sugar/butter mixture and beat again. Scrape down the sides of the bowl if necessary.

In a separate mixing bowl, sift or whisk together the all-purpose flour, cake flour, milk powder, baking soda, and salt.

Add the flour mixture to the the wet ingredients and mix together.

Add the milk chocolate chips to the cookie dough. Stir together until combined.

Once the dough is mixed use a one-tablespoon cookie scoop to form a ball.

Use your thumb to make an indentation in the cookie dough ball.

Place ½ of a jumbo marshmallow in the indentation and fold the dough around it while forming it back into a ball.

Place the cookie dough balls on baking sheet and refrigerate them for 30 minutes.

Preheat your oven to 375 degrees. Space the cookie dough balls on a parchment-lined baking sheet about 2 inches apart.

Bake the cookies for 7 minutes, then remove. Place one Rainbow Mickey Mouse Chip in the center of each cookie. Bake for an additional 30 seconds to soften the candy melt.

Remove from the oven and allow the cookies to rest on the baking sheet for 5 minutes, then transfer to a cooling rack.