They’re not called monster cookies because they’re scary… but they are monstrously delicious. In fact. these chunky, chewy monster cookies might just be the king of all kitchen sink cookies. Featuring peanut butter, oats, crushed pretzels, M&Ms, and chunks of milk chocolate, they hit every necessary cookie note—chewy, crispy, salty, sweet, chocolatey, and buttery. We opted for miniature M&Ms to use in these decadent monster cookies, as we often regular-size to feel a little clunky in the context of a cookie, but feel free to use whatever size you prefer. In fact, you can customize these kid-friendly oatmeal and peanut butter cookies in any number of ways depending on what you like—swap peanut butter for almond better, switch the pretzels for crushed kettle cooked potato chips, use semisweet chocolate instead of milk chocolate, etc. However you spin your personal batch of monster cookies, one thing’s for sure: Pulling out a platter of these loaded treats will always incite excitement.