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Halloween Monster Oatmeal Cookies

Halloween Monster Oatmeal Cookies


  • Author: Harper Callahan
  • Total Time: 45 mins

Description

Chewy, chocolatey, spooky fun! These cookies are loaded with oats, chocolate, pretzels, M&M’s, and candy eyes—bringing festive chaos and cozy vibes in every bite. Perfect for parties, trick-or-treat bags, or just making your kitchen smell like fall magic.


Ingredients

Scale
  • 2 cups (4 sticks) salted butter, room temp

  • 2 cups dark brown sugar

  • ⅔ cup light brown sugar

  • 4 large eggs + 2 egg yolks

  • 2 tbsp vanilla extract

  • 4 cups all-purpose flour

  • 4 tsp baking soda

  • 4 tsp baking powder

  • 1 tsp kosher salt

  • 4 cups old-fashioned oats

  • 2½ cups Halloween M&M’s

  • 2 cups crushed mini pretzel sticks

  • 2 cups semi-sweet chocolate chips or chunks

  • Candy eyes (for decorating)


Instructions

  1. Preheat oven to 350°F (175°C). Line baking sheets with parchment.

  2. Cream butter & sugars until fluffy (3–4 mins).

  3. Add eggs, yolks & vanilla, mixing until smooth.

  4. In a separate bowl, whisk flour, baking soda, baking powder & salt. Slowly mix into wet ingredients.

  5. Stir in oats, M&M’s, pretzels & chocolate chips. Reserve some M&M’s for topping.

  6. Scoop dough (2 tbsp each), place on sheets, press candy eyes gently.

  7. Bake 10–12 mins until edges are golden. Cool 5 mins on tray, then transfer to rack.

Notes

  • For chewier cookies, chill dough 30 mins before baking.

  • Press eyes after baking for perfect monster faces.

  • Use Reese’s Pieces, chopped dried fruit, or white chocolate for fun twists.

  • Gluten-free? Sub 1:1 GF flour + GF oats & pretzels.

  • Prep Time: 25 mins
  • Cook Time: 10–12 mins/batch

Nutrition

  • Calories: 230 kcal per serving
  • Fat: 12g
  • Carbohydrates: 27g
  • Protein: 3g