Before doing anything else, make the Nutella balls. Spray a teaspoon scoop with nonstick spray and plop balls of Nutella onto a parchment lined baking sheet. Freeze overnight, then transfer into a plastic bag and store in the freezer until time to form the cookies.
Preheat your oven to 350 degrees and line 2 baking sheets with parchment paper.
Make your cookie dough from the recipe of your choice. Once the dough is done, add the M&Ms and mini chocolate chips. Transfer the dough into cling wrap and chill in the freezer for 15 minutes or in the fridge for 45 minutes to one hour.
After the dough has chilled, remove it from the cling wrap and cut into 24-26 equal sections. Remove a few Nutella balls from the freezer and begin to form your cookies.
Flatten out a piece of your cookie dough into a disk and add the Nutella ball into the center. Wrap the rest of the dough around the ball and roll between floured hands into a sphere. Gently press the cookie sphere into the shape you want your cookie to be and arrange on the cookie sheet. You can set them pretty close together because they do not spread.
Press pretzel pieces into the cookies, then add M&Ms and chocolate chips to the top of the cookies. Bake for around 15-20 minutes until perfectly golden brown.
Remove from the oven and cool before enjoying. HAPPY COOKING!!