These delicious Monster Cookies are easy to make and taste amazing! Most of these items you already have in your pantry for the best monster cookie recipe.
Preheat the oven to 350°F. Line two large baking sheets with parchment paper or silicone baking mats.
In a large mixing bowl, beat together the eggs, brown sugar, granulated sugar, peanut butter, softened butter, vanilla, salt, and baking soda until smooth and well combined.
Stir in the quick oats until evenly incorporated.
Fold in the M&M's and semi-sweet chocolate chips.
Scoop about 1 tablespoon of dough for each cookie and place the dough balls about 2 inches apart on the prepared baking sheets.
Bake for 9-11 minutes, or until the edges are lightly golden and the centers are just set. Do not overbake.
Let the cookies cool on the baking sheet for 3-5 minutes, then transfer them to a wire rack to cool completely.
Notes
For thicker cookies, chill the dough for 20-30 minutes before baking.
The cookies will look slightly underbaked when removed from the oven but will continue to set as they cool.
Store in an airtight container at room temperature for up to 5 days or freeze for up to 3 months.