Monster Cookies

Introduction

Monster Cookies are a beloved classic for a reason—they combine chewy oats, creamy peanut butter, and two kinds of chocolate in one gloriously loaded cookie. This recipe skips the chill time, so you can go from mixing bowl to warm cookie in under 30 minutes. You get a perfect balance of textures in every giant, satisfying bite.

Prep & Cook Time

• Prep Time: 15 minutes
• Cook Time: 10 minutes
• Total Time: 25 minutes
• Servings: 30 cookies

Ingredients

• 1/2 cup butter (softened)
• 1 cup brown sugar (packed)
• 1 cup granulated sugar
• 3 large eggs (room temperature)
• 1 1/2 cups peanut butter
• 1 1/2 teaspoons corn syrup
• 1 1/2 teaspoons vanilla powder (use half this amount if you prefer less rich vanilla flavor)
• 1 cup all purpose white flour
• 2 teaspoons baking soda
• 3 1/2 cups old fashioned oats
• 208 grams M&M candies (1 cup)
• 1/2 cup semi sweet chocolate chips

Instructions

1. Preheat your oven to 350°F (175°C) and line baking sheets with parchment paper or silicone mats.
2. In a large mixing bowl, cream together the softened butter, brown sugar, and granulated sugar until light and fluffy.
3. Beat in the eggs one at a time, mixing well after each addition.
4. Add the peanut butter, corn syrup, and vanilla powder (use half this amount if you prefer less rich vanilla flavor). Mix until fully combined and smooth.
5. In a separate bowl, whisk together the all-purpose flour and baking soda.
6. Gradually add the dry flour mixture to the wet ingredients, mixing just until no streaks of flour remain.
7. Stir in the old fashioned oats until they are evenly distributed throughout the dough.
8. Using a spatula or wooden spoon, fold in the M&M candies and semi-sweet chocolate chips.
9. Scoop the dough using a 2-tablespoon cookie scoop (or a heaping tablespoon) and place the dough balls about 3 inches apart on the prepared baking sheets. You can gently flatten each ball slightly with your palm.
10. Bake for 9-11 minutes, or until the edges are set and lightly golden. The centers will look soft.
11. Allow the cookies to cool on the baking sheet for 5 minutes before transferring them to a wire rack to cool completely.

Variations

• Mini Monster Cookies: Use a 1-tablespoon scoop for smaller cookies and reduce baking time by 1-2 minutes.
• Skillet Cookie: Press all the dough into a greased, oven-safe skillet. Bake at 350°F for 20-25 minutes until golden and serve warm with ice cream.
• Monster Cookie Bars: Press the dough evenly into a greased 9×13 inch pan. Bake for 22-25 minutes until golden. Let cool completely before cutting into squares.
• Extra Crispy Edges: For crispier cookies, press the dough balls flatter before baking and bake for the full 11 minutes.

Tips for Success

• Use room temperature eggs and softened butter for the smoothest, easiest-to-mix dough.
• For perfectly round cookies, you can gently press a few extra M&Ms or chocolate chips onto the tops of the dough balls right before baking.
• Let the cookies rest on the hot baking sheet for 5 minutes after baking—this allows them to set without becoming too hard.

Storage & Reheating

Store completely cooled cookies in an airtight container at room temperature for up to 5 days. For a warm, fresh-from-the-oven experience, reheat a cookie in the microwave for 10-15 seconds.

FAQ

Can I use quick oats instead of old fashioned oats?

Yes, you can, but the texture will be slightly less chewy and more uniform.

My dough seems very soft. Did I do something wrong?

No, the dough is meant to be soft and sticky due to the high ratio of peanut butter and oats. Using a cookie scoop makes portioning much easier.

Can I freeze the cookie dough?

Absolutely. Scoop the dough into balls, freeze them on a tray, then transfer to a freezer bag. Bake directly from frozen, adding 1-2 extra minutes to the bake time.

Why is corn syrup in the recipe?

The small amount of corn syrup helps keep the cookies soft and chewy without making them overly sweet.

Can I make these gluten-free?

This recipe is nearly gluten-free already; just substitute the 1 cup of all-purpose flour with a 1:1 gluten-free flour blend.

Why did my cookies spread too much?

This is often due to butter that was too soft or melted. Ensure your butter is softened but still cool to the touch. Also, check that your baking soda is fresh.