The Best Cookies and Cream Filling Recipe for Cakes, Cookies, and Cupcakes

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If you’re looking for a cookies and cream filling that’s light, fluffy, and packed with real Oreo flavor, this is the one you’ll keep coming back to. It’s creamy, not overly sweet, and has the perfect balance of smooth marshmallow texture with little bits of cookie throughout.

This filling comes together with simple ingredients and is perfect for cakes like my cookies and cream cake, cupcakes, or even sandwich cookies. The marshmallow fluff keeps it soft and airy, while the Oreo centers and crushed cookies give it that classic cookies and cream taste. It’s an easy way to take any dessert up a notch without a lot of extra work.

Why This Cookies and Cream Filling is the Best

What makes this cookies and cream filling stand out is the texture and the way the ingredients come together. It uses whole Oreo cookies, not just crumbs, so you get that perfect mix of creamy and crunchy in every bite.

The combination of marshmallow fluff (homemade marshmallow fluff if you want to take it up a notch, but store-bought works just fine) and butter creates a filling that’s light, smooth, and easy to spread.

It’s also really versatile—you can use it for cakes, cupcakes, cookies, or even as a dip.

Ingredients You’ll Need

Here’s what you’ll need to make my cookies and cream filling:

• 6 crushed Oreo cookies
• 12 Oreo fillings scraped out of the center of the cookie
• 1 batch of my super delicious homemade marshmallow fluff or 1 16 ounce tub of marshmallow fluff
• 1/2 cup unsalted butter, softened
• 1 ¼ cup powdered sugar
• 1 teaspoon vanilla extract – if you have clear vanilla extract on hand, use it instead of the regular one. It has more of that cookies & cream taste.
• A pinch of salt

How to Make Cookies and Cream Filling

If you’re using homemade marshmallow fluff, make that first. Then follow these steps:

1. Prep: Make sure your butter is soft and all ingredients are ready to go.
2. Cream the Butter: In a stand mixer or with a hand mixer, beat the butter until smooth and creamy.
3. Add Sugar & Flavor: Sift in the powdered sugar, then add the Oreo centers, vanilla, and salt. Beat until smooth and fully combined.
4. Mix in the Marshmallow Fluff: Add the marshmallow fluff and mix until light and fluffy.
   Tip: Lightly grease your spatula to help transfer the fluff easily.
5. Fold in Oreos: Gently fold in the crushed Oreos. Don’t overmix—you want to keep some texture.

Tips for the Best Results

• Make sure your butter is very soft so everything blends smoothly
• Sift your powdered sugar to avoid lumps
• Fold in the Oreos gently to keep the filling light
• Taste as you go and adjust—add more Oreos for crunch or more sugar for sweetness

How to Use This Oreo Filling

• Cakes: Spread between layers for a cookies and cream cake. Pipe a buttercream border around the edge to keep the filling in place.
• Cupcakes: Fill the center for a soft, creamy surprise inside.
• Cookies: Use as a filling for sandwich cookies.
• Macarons: Pipe a ring of buttercream and add this filling in the center.

Storage Tips

Store in an airtight container in the fridge for up to 3 days.
Let it sit at room temperature for a bit before using so it softens back up.
Freezing: You can freeze the filling for up to 3 months. For best texture, add the crushed Oreos after thawing.

Frequently Asked Questions

Other Filling Recipes You’ll Love

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• The Best Peanut Butter Marshmallow Buttercream Frosting Recipe
• Healthy Vegan Cake Frosting – Cashew Based and Refined Sugar Free
• Italian Meringue Buttercream for Filling and Decorating