In a large mixing bowl combine melted butter and peanut butter, mix to combine. Add in granulated sugar and brown sugar. Mix in the eggs and vanilla extract.
1 cup Unsalted butter, 1/2 cup Creamy peanut butter, 1 cup Granulated sugar, 3/4 cup Light brown sugar, 2 Eggs, room temperature , 1 tbsp Vanilla extract
To the wet ingredients, add in flour, baking soda, and salt. Mix well until evenly combined. Gently fold in the oats, chopped peanuts, M&Ms, and chocolate.
2 cups All-purpose flour, 1 tsp Baking soda, 1 tsp Salt, 3/4 cup Old fashioned rolled oats, 1/2 cup Chopped peanuts, 1 cup Semisweet chocolate chips or chunks , 1 cup M&M's candy
Cover and chill dough for 60 minutes. After dough has chilled preheat oven to 350 degrees F.
Use a portion scoop or measuring spoon to scoop even sized scoops of cookie dough. Arrange 2-3" apart on the prepared baking sheet.
Bake in a preheated 350 degree oven for 9-12 minutes until golden brown. Allow to cool slightly on the baking sheet, transfer to wire rack, top with a sprinkle of flaky salt, and cool completely. These will keep in an airtight container for up to a week!
Flaky salt, for topping
Notes
*Make sure to give cookie dough time to chill, this allows the fat to set back up and stops the cookies from spreading too much.*Don't overcrowd cookies on the baking sheet, allow 2-3" between cookies so they do not spread into each other.