01 - 
                Warm your oven to 350°F and put parchment on two cookie sheets.
              
              
              
                02 - 
                Using an electric mixer, beat the soft butter with both sugars on medium for about 2 minutes until it's fluffy.
              
              
              
                03 - 
                Mix in the egg yolks and vanilla until everything looks pale and airy, taking around 2 minutes.
              
              
              
                04 - 
                Put in flour, baking powder, baking soda, and salt. Stir just enough to mix it all together without seeing any flour streaks.
              
              
              
                05 - 
                Use a spatula to carefully fold the M&M's, white chocolate morsels, pretzel bits, potato chip chunks, and sprinkles into the dough.
              
              
              
                06 - 
                Drop spoonfuls onto your lined sheets, cooking 6 cookies at once for 10-12 minutes. If you want flatter treats, push them down after 10 minutes, then cook 2-3 more minutes till the edges turn golden.
              
              
              
                07 - 
                If you want, use a glass to make each hot cookie perfectly round. Let them sit on the pans for 5 minutes before moving to a rack.