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Cookies & BarsNo. 6859 · The 2026 edition

Soft and Chewy Monster Cookies Recipe

These soft and chewy monster cookies are packed with peanut butter, oats, and a rainbow of mix-ins for a spooktacular treat.

Hard

Our own summary of the original — the full post and photos live at adventuresofmel.com.

Halloween Content Extraction
PHOTO · ADVENTURESOFMEL.COM

This recipe yields soft, chewy monster cookies loaded with peanut butter, oats, chocolate chips, peanut butter chips, and M&M's. Optional additions like candy eyeballs make them perfect for Halloween. Bake at 375°F for 8-10 minutes for a deliciously fun treat.

Ingredients

Directions

  1. Set your oven to 375°F so it's ready when you need it.
  2. In a large bowl, beat the softened butter and light brown sugar together until creamy.
  3. Stir in the peanut butter until well combined.
  4. Add the large egg and vanilla extract, mixing thoroughly.
  5. In another bowl, whisk together the all-purpose flour, baking soda, and sea salt. Gradually add this dry mixture to the wet ingredients, mixing until just combined.
  6. Fold in the oats until evenly distributed throughout the dough.
  7. Mix in the chocolate chips, peanut butter chips, M&M's, and any optional candies like crushed mini Snickers or Reese's Peanut Butter Cups.
  8. Use a cookie scoop to drop rounded portions of dough onto a baking sheet.
  9. Bake for 8 to 10 minutes, or until the edges are lightly golden and the centers look set.
  10. If you're using candy eyeballs, gently press them into the tops of the cookies while they're still hot from the oven.
  11. Transfer the cookies to a wire rack to cool completely. Serve with a glass of cold milk and enjoy!

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