Preheat oven to 350 degrees
Mix the butter, 1 cup sugar, 1 cup brown sugar, 3 eggs, and 1 ½ cups peanut butter until well combined
Add the 2 teaspoons baking soda, 1 teaspoon vanilla, and 4 ½ cups old fashioned oats, and mix until just combined
Stir in the 1 cup chocolate chips and 1 cup M&Ms gently
Spread the mixture in a greased 12x18 pan (damp fingers work best)
Bake for approximately 18 minutes, do not overbake and slightly underbake if anything
