Christmas Monster Cookies Recipe
Introduction
These Christmas Monster Cookies are a festive and chewy treat, perfect for holiday gatherings or cozy nights in. Packed with oats, colorful M&M’s, pretzels, and chocolate chips, they deliver a delightful crunch and a burst of flavor in every bite.

Ingredients
- 2 sticks (1 cup) salted butter, at room temperature
- 1 cup dark brown sugar
- 1/2 cup granulated sugar
- 2 large eggs, plus 1 egg yolk
- 1 tablespoon vanilla extract
- 2 cups all-purpose flour
- 2 teaspoons baking soda
- 2 teaspoons baking powder
- 1/2 teaspoon kosher salt
- 2 cups old fashioned oats
- 1 1/4 cups holiday M&M’s
- 1 cup mini pretzel sticks, crushed
- 1 cup semi-sweet chocolate chips or chunks
- 1/2 cup white chocolate chips
Instructions
- Step 1: Preheat your oven to 350° F and line a baking sheet with parchment paper.
- Step 2: In a large mixing bowl, beat together the butter, dark brown sugar, granulated sugar, and vanilla extract until well combined and creamy.
- Step 3: Beat in the 2 large eggs plus 1 egg yolk one at a time, ensuring each is fully incorporated before adding the next.
- Step 4: Add the all-purpose flour, baking soda, baking powder, and kosher salt to the bowl. Mix until just combined.
- Step 5: Stir in the old fashioned oats until evenly distributed throughout the dough.
- Step 6: Fold in 1 cup of the holiday M&M’s, crushed pretzels, semi-sweet chocolate chips, and white chocolate chips.
- Step 7: Roll the dough into balls roughly 1/4 cup in size. Place them 3 inches apart on the prepared baking sheet to allow room for spreading.
- Step 8: Bake for 8 minutes, then rotate the baking sheet for even baking and continue baking for another 2 minutes.
- Step 9: Remove the pan from the oven and gently press the remaining M&M’s onto the tops of the cookies. Return to the oven and bake for an additional 2-3 minutes.
- Step 10: Let the cookies cool on the baking sheet. They will firm up as they rest. Enjoy them warm for the best gooey texture, or allow them to cool completely.
Tips & Variations
- For a nutty twist, try adding 1/2 cup chopped walnuts or pecans along with the other mix-ins.
- You can substitute pretzels with your favorite crunchy cereal for a different texture.
- Use regular M&M’s if holiday colors aren’t available.
- Allow the dough to chill for 30 minutes before baking to minimize spreading if needed.
Storage
Store cooled cookies in an airtight container at room temperature for up to 4 days. For longer storage, freeze the baked cookies in a sealed container for up to 3 months. To reheat, warm in a low oven or microwave for a few seconds to enjoy a soft, fresh-baked feel.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
Can I use salted butter instead of unsalted?
This recipe calls for salted butter, which enhances the flavor. If using unsalted butter, add a pinch more salt to the dough to balance the sweetness.
Can I make these cookies gluten-free?
Yes, substitute the all-purpose flour with a gluten-free flour blend and ensure your oats are labeled gluten-free. The cookies should turn out just as delicious.
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Christmas Monster Cookies Recipe
- Total Time: 35 minutes
- Yield: 20 cookies 1x
Description
These festive Christmas Monster Cookies combine a chewy texture with the perfect holiday crunch from mini pretzels and colorful M&M’s. Bursting with chocolate chips and oats, they deliver a delightful mix of flavors and textures, ideal for celebrating the season with friends and family.
Ingredients
Base Ingredients
- 2 sticks (1 cup) salted butter at room temperature
- 1 cup dark brown sugar
- 1/2 cup granulated sugar
- 2 large eggs
- 1 egg yolk
- 1 tablespoon vanilla extract
Dry Ingredients
- 2 cups all-purpose flour
- 2 teaspoons baking soda
- 2 teaspoons baking powder
- 1/2 teaspoon kosher salt
- 2 cups old fashioned oats
Mix-ins
- 1 1/4 cups holiday M&M’s
- 1 cup mini pretzel sticks, crushed
- 1 cup semi-sweet chocolate chips or chunks
- 1/2 cup white chocolate chips
Instructions
- Preheat Oven and Prepare Pan: Preheat your oven to 350° F (175° C) and line a baking sheet with parchment paper to prevent sticking and ensure even baking.
- Mix Wet Ingredients: In a large mixing bowl, beat together the room temperature butter, dark brown sugar, granulated sugar, and vanilla extract until the mixture is smooth and creamy. Then, add the 2 whole eggs and 1 egg yolk one at a time, beating well after each addition to ensure everything is fully combined.
- Add Dry Ingredients: Gradually add the all-purpose flour, baking soda, baking powder, and kosher salt into the wet mixture. Beat together until just combined. Then fold in the old fashioned oats, ensuring an even distribution throughout the dough.
- Incorporate Mix-ins: Gently fold in 1 cup of the holiday M&M’s, the crushed mini pretzel sticks, semi-sweet chocolate chips, and white chocolate chips. This step adds texture and bursts of flavor to the dough.
- Form Cookie Balls: Roll the dough into 1/4 cup sized balls, roughly the size of a golf ball. Place them on the prepared baking sheet, leaving at least 3 inches between each to allow for spreading.
- Bake Cookies: Place the baking sheet in the oven and bake for 8 minutes. Then rotate the pan for even cooking and bake an additional 2 minutes.
- Add Remaining M&M’s and Finish Baking: Remove the pan from the oven and press the remaining M&M’s gently into the surface of each cookie. Return the cookies to the oven and bake for another 2 to 3 minutes until the edges are golden and the centers set.
- Cool and Serve: Remove the cookies from the oven and allow them to cool on the baking sheet. They will continue to firm up as they cool. Enjoy them warm for the best texture, or store in an airtight container for up to 4 days.
Notes
- Using room temperature butter ensures better mixing and a softer cookie texture.
- Do not overmix the dough once flour is added to keep the cookies tender.
- Spacing cookies 3 inches apart prevents them from spreading into each other while baking.
- Pressing extra M&M’s on top after initial baking enhances appearance and adds extra color.
- These cookies keep well for up to 4 days stored in an airtight container at room temperature.
- Prep Time: 15 minutes
- Cook Time: 20 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Keywords: Christmas cookies, monster cookies, holiday cookies, oatmeal cookies, chocolate chip cookies, festive baking, holiday treats

