Go Back
+ servings
Oatmeal Sandwich Cookies Photo

Oatmeal Sandwich Cookies Recipe

Amanda Powell
These Oatmeal Sandwich Cookies are to die for! Chewy oatmeal cookies filled with a chocolate marshmallow crème frosting. These are the most irresistible cookies ever and will completely change your mind about how amazing oatmeal cookies truly are.
5 from 1 vote
Prep Time 20 minutes
Cook Time 10 minutes
Total Time 30 minutes
Cuisine Marshmallows
Servings 14 1 sandwich cookie
Calories 516 kcal

Ingredients
  

  • 1 2/3 cups All-Purpose Flour
  • 1 1/2 cups Old Fashioned Oats
  • 1/2 teaspoon Salt
  • 1/2 teaspoon Baking Soda
  • 1 teaspoon Ground Cinnamon
  • 1 cup Unsalted Butter room temperature
  • 1 cup Brown Sugar
  • 1/4 cup Granulated Sugar
  • 1 large Egg room temperature
  • 1 large Egg Yolk
  • 1 teaspoon Pure Vanilla Extract
  • 3/4 cup Unsalted Butter room temperature
  • 7 ounces Marshmallow Cream
  • 2 1/2 cups Powdered Sugar
  • 1/4 cup Unsweetened Cocoa Powder
  • 1/4 teaspoon Salt
  • 2-3 tablespoons Heavy Cream

Instructions
 

  • In a medium bowl, mix together the flour, oats, salt, baking soda, and cinnamon together. Set aside.
  • In a mixer, beat together the butter and both sugars until light and fluffy. Add in the egg and yolk together and beat well for about a minute before mixing in the vanilla extract.
  • Add in the dry ingredients and mix until just combined. Chill the dough for about an hour.
  • While the dough chills, preheat the oven to 350°F.
  • Scoop balls of cookie dough that are about 1 1/2 tablespoons big and place them 2-inches apart on a parchment or silpat-lined baking sheets.
  • Bake for 8 – 10 minutes, or until the edges are a golden brown. The middles may still look a little under-baked, and that is normal.
  • Allow to cool on the baking sheet for about 2 minutes before transferring to a wire rack to cool completely.
  • As the cookies cool, make the filling.
  • Add the butter, marshmallow crème, and half the powdered sugar and chocolate into a mixing bowl.
  • Mix on low to incorporate the powdered sugar and chocolate into the butter and crème. It may look like it will not incorporate, but keep mixing.
  • Add the remaining sugar and chocolate along with the salt and vanilla extract.
  • Continue to beat. The mixture should eventually incorporate and be very thick.
  • Add the heavy cream one tablespoon at a time until it comes a nice spreadable consistency.
  • Turn over half the oatmeal cookies and top with the chocolate crème.
  • Top the crème with the other cookies to make sandwiches.

Notes

  • Store in an airtight container for up to a week.

Nutrition

Calories: 516kcalCarbohydrates: 69gProtein: 4gFat: 25gSaturated Fat: 15gSodium: 197mgFiber: 2gSugar: 46g
Keyword Baked, Baking, Chocolate, Cookies, Desserts, Family Meals and Snacks, Frosting, Lunchbox, Marshmallows, Oatmeal
Tried this recipe?Let us know how it was!