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4.9 from 24 votes

Peanut Butter Oatmeal Sandwich Cookies

The softest, most tender peanut butter cookies, sandwiched together with rich peanut butter frosting! These Peanut Butter Oatmeal Sandwich Cookies are a homemade version of the Girl Scout cookies called Do-si-dos. 

Prep Time
10 mins
Cook Time
10 mins
Chill Time
1 hr
Total Time
1 hr 18 mins
Servings: 29
Calories: 262 kcal
Course: Dessert
Cuisine: American

Ingredients

For the cookies
  • 1/2 cup butter softened (1 stick)
  • 1/2 cup butter-flavored shortening*
  • 1 cup dark brown sugar or light
  • 3/4 cup granulated sugar
  • 1 cup creamy peanut butter
  • 2 large eggs
  • 1 teaspoon vanilla
  • 1 & 1/2 cups flour spooned and leveled
  • 2 teaspoons baking soda
  • 1 teaspoon kosher salt
  • 1 cup quick oats**
  • 1/2 cup old fashioned oats**
For the frosting
  • 4 tablespoons butter
  • 1/2 cup creamy peanut butter
  • 1 cup powdered sugar
  • 2 tablespoons milk OR cream plus more
  • 1 teaspoon vanilla

Instructions

    Cup of Yum
  1. In a large bowl or stand mixer, beat 1/2 cup butter and 1/2 cup shortening for 2 minutes, scraping the sides and bottom.
  2. Add 1 cup brown sugar and 3/4 cup white sugar. Beat for 2 minutes, until light and fluffy, scraping the sides and bottom of the bowl.
  3. Add 1 cup peanut butter and beat until incorporated.
  4. Add 2 eggs and 1 teaspoon vanilla. Beat well, scraping sides and bottom.
  5. Add 1 and 1/2 cups flour but don't mix it in. Use a small spoon to stir 2 teaspoons baking soda and 1 teaspoon salt into the flour. Then beat the dry ingredients gently into the wet ingredients. Stop mixing when there are still flour streaks.
  6. Add 1 cup quick oats and 1/2 cup old fashioned oats. Stir until incorporated but do not over mix. Make sure you scrape the sides and bottom.
  7. Cover the bowl and chill the dough in the fridge for 1-3 hours (or overnight).
  8. When the dough is chilled, preheat the oven to 350 degrees F. Line 2 baking sheets with silicone baking mats or parchment paper.
  9. Use a 1 inch cookie scoop to measure out the dough. 
  10. Bake the cookies at 350 for 8-10 minutes until the centers have just barely lost their shine. The edges should be firm. Do not over bake.
  11. Let cool on the sheet for 5 minutes before removing to a cooling rack. Let cool completely while you make the frosting.
  12. Make the frosting: In a large bowl or stand mixer, beat the butter until it is smooth and creamy. Add 1/2 cup  peanut butter and combine. 
  13. Add 1 cup powdered sugar and beat, scraping the sides. 
  14. Add 2 tablespoons of milk or cream to start. Add 1 teaspoon vanilla.
  15. Add more milk or cream, a couple teaspoons at a time, until it has reached a good spreading consistency that you like. 
  16. Spread about a tablespoon of frosting on the bottom of each cookie, then sandwich with another cookie. Devour! So good dipped in milk. 

Notes

  • *You can replace the shortening with butter! The cookies will be delicious, but not quite as soft as with shortening. I tried it both ways. 
  • **You can use any combination of old fashioned oats and quick oats that you like. All old fashioned, all quick, or a combo. It's really just personal preference! 

Nutrition Information

Serving 1cookie sandwich Calories 262kcal (13%) Carbohydrates 27g (9%) Protein 5g (10%) Fat 16g (25%) Saturated Fat 5g (25%) Polyunsaturated Fat 3g Monounsaturated Fat 6g Trans Fat 1g Cholesterol 25mg (8%) Potassium 127mg (4%) Fiber 1g (4%) Sugar 18g (36%) Vitamin A 166IU (3%) Calcium 20mg (2%) Iron 1mg (6%)

Nutrition Facts

Serving: 29Serving

Amount Per Serving

Calories 262

% Daily Value*

Serving 1cookie sandwich
Calories 262kcal 13%
Carbohydrates 27g 9%
Protein 5g 10%
Fat 16g 25%
Saturated Fat 5g 25%
Polyunsaturated Fat 3g 18%
Monounsaturated Fat 6g 30%
Trans Fat 1g 50%
Cholesterol 25mg 8%
Potassium 127mg 3%
Fiber 1g 4%
Sugar 18g 36%
Vitamin A 166IU 3%
Calcium 20mg 2%
Iron 1mg 6%

* Percent Daily Values are based on a 2,000 calorie diet.