Dessert

Mashup Cookies Recipe

ByCleo Brixton October 27, 2025October 27, 2025

Introduction

Mashup Cookies are a delightful mix of sweet, salty, and crunchy all in one bite. Loaded with oats, pretzels, pecans, chocolate chips, and toasted marshmallows, these cookies offer a unique twist on a classic treat. Perfect for cozy afternoons or sharing with friends.

A close-up view of four thick, golden-brown cookies on a black wire cooling rack lined with light brown parchment paper, each cookie studded with melted dark chocolate chunks and gooey marshmallow bits, showing rough, textured surfaces with crispy edges, one cookie partially broken revealing a soft inside; to the left, part of a white plate with a deep red flower and green leaves rests on a white marbled surface. photo taken with an iphone --ar 4:5 --v 7

Ingredients

2 sticks (1 cup) salted butter, at room temperature
1 cup dark brown sugar
2 large eggs, plus 1 egg yolk, at room temperature
1 tablespoon vanilla extract
2 cups all-purpose flour
2 teaspoons baking soda
2 teaspoons baking powder
1/2 teaspoon sea salt
2 cups old fashioned oats
1 1/2 cups mini pretzel sticks, crushed
1 cup pecans, chopped
1 1/2 cups dark chocolate chips
1-2 cups regular marshmallows, to your taste

Instructions

Step 1: Line a baking sheet with parchment paper and preheat the broiler on your oven.
Step 2: In a large mixing bowl, beat together the butter, brown sugar, and vanilla extract until combined. Then beat in the eggs and egg yolk one at a time until fully mixed.
Step 3: Add the flour, baking soda, baking powder, and sea salt to the mixture and beat until incorporated. Stir in the oats, crushed pretzels, chopped pecans, and dark chocolate chips.
Step 4: Spread the marshmallows evenly on the prepared baking sheet and broil for 1-2 minutes, watching closely. The marshmallows toast quickly and should be lightly browned. Remove from the oven.
Step 5: Turn your oven temperature down to 350°F (175°C). Mix the toasted marshmallows into the cookie dough gently—just a few folds to avoid over-mixing.
Step 6: Roll the dough into 1/4 cup-sized balls and place them about 3 inches apart on a parchment-lined baking sheet. Optionally, add a few toasted marshmallows or extra chocolate chips on top for garnish.
Step 7: Bake at 350°F for 8 minutes, then rotate the pan and bake for another 4-5 minutes. Some cookies may spread more than others. Remove from the oven and allow to cool on the baking sheet; they will continue to cook slightly while cooling.
Step 8: Enjoy the cookies warm for the best taste, or let them cool completely before storing.

Tips & Variations

Use mini marshmallows for easier incorporation and consistent toastiness.
Swap pecans for walnuts or almonds for a different nutty flavor.
For extra chewiness, add a tablespoon of honey or maple syrup to the dough.
If you prefer less salt, reduce the pretzel quantity or use unsalted nuts.

Storage

Store cooled Mashup Cookies in an airtight container at room temperature for up to 4 days. To reheat, warm them briefly in the microwave for 10-15 seconds to bring back that gooey marshmallow softness.

How to Serve

Several round chocolate chip cookies lie on a wire rack covered with parchment paper. Each cookie is golden brown with a rough, bumpy texture and scattered with melted chocolate chunks and white gooey marshmallow spots. One cookie has a bite taken out, showing a soft inside with chocolate and marshmallow. The wire rack and cookies rest on a white marbled surface with a cracked, worn look. To the left, part of a white plate with a deep red flower and green leaves is slightly visible. Photo taken with an iphone --ar 4:5 --v 7

Serve this delicious recipe with your favorite sides.

FAQs

Can I use regular granulated sugar instead of brown sugar?

Brown sugar adds moisture and a deeper flavor to the cookies. Using granulated sugar alone may result in a drier, less flavorful cookie, but can be substituted if needed.

Do I have to toast the marshmallows before mixing them in?

Toasting the marshmallows before adding them ensures a rich, caramelized flavor and prevents them from melting completely in the dough, maintaining their texture within the cookies.