In a mixer, cream butter and sugars together until light and fluffy. Add eggs and vanilla and mix until combined.On low, add flour, soda, & salt until just combined.Fold in toasted pecans, M&M's and chocolate disks.Scoop dough using a 2" ice cream scoop. PLace on a parchment lined pan and chill the pan for at least 30 minutes. Sprinkle tops with sea salt, if desired.Bake at 350 degrees for 13-16 mins.