1
Whisk together the dry ingredients and set aside. Cream together the butter and sugars. Add the eggs and vanilla, then beat.
2
Mix in the dry ingredients next. Then, stir in some of the M&Ms and the chocolate chips.
3
Press the cookie dough into a prepared pan. Top with the remaining M&Ms and sprinkle with flaky sea salt.
4
Bake and let cool before slicing and serving.