Pre-heat your oven to 350° F and line your baking sheets with parchment paper.
In a large bowl add your sugar and brown sugar and whisk it up. Slowly pour in your butter and mix again. Next add your eggs and vanilla and stir again until well combined.
Add your dry ingredients to this mixture and fold until incorporated. Dough should be soft in texture. Next, add your chocolate chips and m&ms and fold until just combined.
Scoop your cookie dough into 1-2 inch balls onto your baking sheets lined with parchment paper a couple inches apart. Top with extra chocolate chips and m&ms and place in the oven for 8-10 minutes at 350° F.
Remove from oven and top with flaky sea salt and extra chocolate and m&ms if you'd like. Let cool, share and enjoy!!