Preheat the oven to 350 degrees Farenheit.
In a large bowl, cream together the butter and sugars. Beat until it's light and creamy, about 2 minutes.
Add in the eggs and vanilla extract and stir till just combined.
Add in the flour, baking soda, and salt. Stir together till you have a nice soft dough.
(If the dough is too soft, add in more flour 1 TBS at a time)
Fold in the m&ms, white chocolate chips, and sprinkles.
Scoop the cookie dough into large 2 TBS sized cookie balls onto an baking sheet lined with parchment paper.
Bake the cookies for 10-12 minutes until the sides are golden and the tops are just set.
Remove the pan from the oven and let the cookies sit on the pan for 5 to 10 minutes, as they'll continue cooking.
Transfer cookies to a cooling rack to cool completely, or enjoy warm.