Preheat oven to 350 degrees. Line two baking sheets with parchment paper and set aside.
In a medium bowl, cream your butter and sugars together. Then add the eggs and vanilla in. Beat until combined.
Then add in flour, baking powder, baking soda and salt. Mix until combined.
Add in the M&M's, white chocolate chips, pretzel pieces, and sprinkles. Gently fold in with a spatula until everything is combined.
Scoop cookies onto a parchment lined cookie sheet.
Bake for 10-12 minutes, or until the edges are set.
Allow to cool a few minutes on the pan before transferring to a cooling rack.
