If you love oatmeal cookies, wait until you try them sandwiched together with a sweet, creamy filling! These Oatmeal Sandwich Cookies are the perfect mix of soft, chewy, and just the right amount of sweetness. Whether you’re making them for a special occasion, packing them in a lunchbox, or just treating yourself, these cookies will quickly become a favorite.

Why You’ll Love This Recipe

Soft and chewy texture – The perfect balance of crispy edges and a tender center.
Classic flavors – Warm cinnamon and brown sugar make every bite irresistible.
Creamy filling – The vanilla buttercream filling takes these cookies to the next level.
Great for sharing – Perfect for parties, bake sales, or gifting to friends and family.

Ingredients

Here’s a peek at what you’ll need to make these delicious cookies. Don’t forget to check the full ingredient list below!

Rolled oats
Brown sugar
Butter
Cinnamon
Vanilla extract
Flour
Baking soda
Eggs
Powdered sugar (for the filling)
Milk or heavy cream

How to Make Oatmeal Sandwich Cookies

Step 1: Mix the Dry Ingredients

In a bowl, whisk together the oats, flour, cinnamon, baking soda, and a pinch of salt. This helps distribute everything evenly before adding the wet ingredients.

Step 2: Cream the Butter and Sugar

In a separate bowl, beat the butter and brown sugar until light and fluffy. Add the eggs and vanilla, mixing until smooth and fully combined.

Step 3: Combine and Chill

Gradually mix the dry ingredients into the wet ingredients until just combined. Cover and refrigerate the dough for about 30 minutes to make it easier to handle.

Step 4: Scoop and Bake

Preheat the oven and line a baking sheet with parchment paper. Scoop out small portions of dough and roll them into balls. Place them on the baking sheet, leaving space between each cookie. Bake until golden brown and let them cool completely.

Step 5: Make the Filling

While the cookies cool, beat the butter, powdered sugar, vanilla extract, and a splash of milk or heavy cream until light and fluffy.

Step 6: Assemble the Sandwiches

Spread or pipe a generous layer of filling onto the flat side of one cookie, then top it with another cookie. Press gently to sandwich them together.

Expert Tips and Tricks

Chilling the dough prevents the cookies from spreading too much.
Use a piping bag for a neater, more even filling.
Let the cookies cool completely before assembling to avoid melting the filling.
For extra flavor, add a touch of molasses or a sprinkle of nutmeg to the dough.

Recipe Variations and Possible Substitutions

Chocolate Lovers – Add mini chocolate chips to the cookie dough.
Healthier Option – Use coconut sugar and swap some butter for applesauce.
Nutty Version – Stir in chopped pecans or walnuts for a crunch.
Maple Twist – Swap vanilla extract in the filling for maple extract.

Serving and Pairing Suggestions

These cookies are perfect with a cold glass of milk, a cup of hot coffee, or even crumbled over a bowl of vanilla ice cream for a fun dessert twist.

Storage and Reheating Tips

Store in an airtight container at room temperature for up to 3 days.
Refrigerate for a firmer filling and a slightly chewier texture.
Freeze assembled cookies in an airtight container for up to 2 months—just thaw before enjoying.

Frequently Asked Questions

Can I make these cookies ahead of time?
Yes! You can bake the cookies and store them in an airtight container for a few days before assembling them with the filling.

Can I use quick oats instead of rolled oats?
You can, but the texture will be different—rolled oats give the cookies a chewier bite.

What’s the best way to make the filling extra fluffy?
Beating the butter and sugar for a few extra minutes will give you a lighter, creamier texture.

Can I use a different filling?
Absolutely! Cream cheese frosting, peanut butter filling, or even chocolate ganache would all be delicious.

Conclusion

These Oatmeal Sandwich Cookies are the ultimate treat—soft, chewy, and packed with flavor. Whether you stick with the classic vanilla filling or try a fun variation, they’re guaranteed to be a hit. Make a batch today and enjoy a little homemade goodness!

Oatmeal Sandwich Cookies – Soft, Chewy, and Irresistible

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Soft, chewy, and filled with a creamy vanilla buttercream, these Oatmeal Sandwich Cookies are the perfect balance of comforting flavors and indulgent sweetness. With warm cinnamon and brown sugar in every bite, they’re great for lunchboxes, special occasions, or simply treating yourself!

Author: Touria Elkoudssi
Prep Time: 15 minutes
Cook Time: 12 minutes
Total Time: 27 minutes (plus chilling time)
Yield: 12 sandwich cookies 1x
Category: Dessert
Method: Baking
Cuisine: American
Diet: Vegetarian

Instructions

Prepare the Cookie Dough:
- In a bowl, whisk together the oats, flour, cinnamon, baking soda, and salt.
- In another bowl, beat the butter and brown sugar until light and fluffy.
- Add the egg and vanilla extract, mixing until well combined.
- Gradually mix in the dry ingredients until just combined.
Chill the Dough:
- Cover and refrigerate the dough for about 30 minutes to prevent spreading.
Bake the Cookies:
- Preheat the oven to 350°F (175°C) and line a baking sheet with parchment paper.
- Scoop small portions of dough and roll into balls. Place them on the baking sheet, leaving space between each.
- Bake for 10-12 minutes, or until golden brown.
- Let the cookies cool completely before assembling.
Make the Filling:
- Beat the butter, powdered sugar, vanilla extract, and milk (or cream) until light and fluffy.
Assemble the Sandwiches:
- Spread or pipe the filling onto the flat side of one cookie, then press another cookie on top to form a sandwich.

Notes

For softer cookies, slightly underbake them and let them cool on the baking sheet.
If you prefer a firmer filling, chill the assembled cookies for 30 minutes before serving.
Swap vanilla extract in the filling for maple extract for a unique twist.