Monster Cookies

Close-up of chunky cookies studded with red and blue M&M candies and white chocolate chunks on a white surface.

Peanut butter? Yes. Oats? Yes. Candy? Yes. Chocolate? Two kinds. All of it in one festive monster of a cookie. The defining move is the smash—pull the cookies out of the oven and then very quickly smash each with the bottom of a glass to flatten it. This gives you a crackled top, a chewy middle, and a wide, glamorous footprint. Press red and blue candies and white chocolate on top while everything’s still warm for a final patriotic flourish, or choose your own color combo for festive cookies year-round.

Monster Cookies

Makes about 15 cookies

Ingredients
  

  • ½ cup (113 grams) unsalted butter, room temperature
  • ½ cup (128 grams) creamy peanut butter
  • ½ cup (110 grams) firmly packed dark brown sugar
  • ¼ cup (50 grams) granulated sugar
  • 1 large egg (50 grams), room temperature
  • 1 large egg yolk (19 grams), room temperature
  • 2 teaspoons (8 grams) vanilla extract
  • 1½ cups (188 grams) all-purpose flour
  • 1¼ cups (125 grams) old-fashioned oats
  • 1 teaspoon kosher salt
  • ½ teaspoon baking powder
  • ¼ teaspoon baking soda
  • ½ cup (112 grams) mini red and blue candy-coated chocolate pieces
  • 3 ounces (84 grams) white chocolate, chopped
  • Garnish: mini red and blue candy-coated chocolate pieces, chopped white chocolate

Instructions

  • Preheat oven to 350°F (180°C). Line 2 rimmed baking sheets with parchment paper.
  • In the bowl of a stand mixer fitted with the paddle attachment, beat butter, peanut butter, and sugars at medium speed until creamy, 1 to 2 minutes, stopping to scrape paddle and bottom and sides of bowl. Add egg and egg yolk, beating until combined. Beat in vanilla; scrape sides of bowl.
  • In a medium bowl, whisk together flour, oats, salt, baking powder, and baking soda. With mixer on low speed, gradually add flour mixture to butter mixture, beating just until combined and stopping to scrape sides of bowl. Fold in chocolate pieces and white chocolate.
  • Using a 3-tablespoon spring-loaded scoop, scoop dough (about 60 grams each), and place 2 inches apart on prepared pans.
  • Bake, one pan at a time, until edges are golden brown and set, 12 to 15 minutes. (Second pan can stand at room temperature while the first bakes.) Immediately smash cookies with bottom of a glass or jar. Garnish with chocolate pieces and white chocolate, if desired. Let cool completely on pans. Store in an airtight container for up to 3 days.
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