Oatmeal Sandwich Cookies

Brown Butter Oatmeal Sandwich Cookies

Two soft and chewy oatmeal cookies sandwiched together with cinnamon cream cheese icing. Packed with flavor, these brown butter oatmeal sandwich cookies area a perfect makeover of your favorite oatmeal cream pie cookies. 
Course Dessert
Prep Time 45 minutes
Cook Time 8 minutes
Total Time 2 hours 30 minutes
Servings 20 cookies
Calories 312kcal
Author Fiona Dowling


For the Cookies

  • 1 cup unsalted butter
  • 1 cup packed brown sugar (light or dark I used dark)
  • 1/2 cup granulated sugar
  • 2 large eggs room temperature
  • 2 teaspoons vanilla
  • 3/4 cup flour
  • 1 teaspoon baking soda
  • 1 1/2 teaspoons cinnamon
  • 1/4 teaspoon nutmeg
  • 1 cup quick oats or 1 cup old-fashioned rolled oats processed in the food processor 4-5 times
  • 2 cups old-fashioned rolled oats

For the Cream Cheese Frosting

  • 1/2 cup cream cheese room temperature
  • 1/4 cup unsalted butter room temperature
  • 2-3 cups powdered sugar sifted, confectioners'
  • 1 teaspoon vanilla
  • 1 teaspoon cinnamon


For the Cookies

  • In a heavy-bottom sauce pan, melt the butter over medium heat. Continue heating & whisking until the butter turns browns. Remove from the heat and allow to cool.
  • In a medium bowl, whisk together the flour, cinnamon, nutmeg, baking soda and salt for about 20 seconds. Set aside.
  • In a large bowl or the the stand of your electric mixer, beat the brown butter & sugars on medium speed until combined. Then add in the vanilla & eggs and continue mixing for about 30 seconds.
  • Scrape down the sides of your bowl. Slowly add in the flour mixture beating low speed until almost combined. Turn off your mixer, scrape down the sides of your bowl, and gently fold in your oats. The batter will be thick, so you may want to finish mixing by hand with a wooden spoon.
  • Form dough into 2 tablespoon balls. You should get about 40 cookies. Cover with clingfilm, and chill dough in the refrigerator for at least 1 hour (or up to 3 days).
  • Preheat the oven to 350F degrees. Remove dough from the fridge and place on baking sheets lined with parchment paper or a silicone baking mat.
  • Bake for 8-10 minutes (mine took exactly 8 minutes), until cookies are slightly browned on the edges. Leave to cool on the tray for about 3-5 minutes, then transfer to a wire rack to continue cooling.

For the Filling

  • In a large bowl or the stand of an electric mixer, beat the cream cheese and butter together on medium speed until light and fluffy with no lumps remaining (about 3-4 minutes). Reduce to low-medium speed and slowly add in the powdered sugar, cinnamon & vanilla. The frosting should be spreadable, about the consistency of peanut butter.
  • Spread about 1.5 tablespoons of frosting on the bottom side of half of the cookies, then top with the additional cookies right side up. You should get about 20 sandwiches.
  • Cookies are best if stored in an airtight container at room temperature for about 2 days, or in the refrigerator for up to 5.


Calories: 312kcal