Oatmeal Sandwich Cookies with Peanut Butter Filling

Today is a special day. My good friend Ciara from college is coming to spend the weekend in DC! Being a fairly adept hostess, albeit somewhat less skillful than Emily Post, I wanted to bake something as a welcoming gift. As I waited to pick her up from the train station, I perused through some of my favorite baking blogs and settled on some delicious looking peanut butter sandwich cookies from Joy the Baker. These cookies are creamy and rich, and they’re also easily portable. So as we’re trekking from the Capitol to the Lincoln Monument we’ll have our own replenishments!

Oatmeal Sandwich Cookies with Peanut Butter Filling
Adapted from Joy the Baker

Ingredients for Cookies
1/2 cup unsalted butter, softened
1 cup brown sugar, packed
1 large egg
1 teaspoon vanilla extract
1 1/4 cups uncooked old-fashioned oats
1 cup all-purpose flour
1/2 teaspoon baking powder
1/2 teaspoon baking soda
1/2 teaspoons salt
1 teaspoon ground cinnamon
1/4 teaspoon ground nutmeg
1/2 cup chopped pecans

Ingredients for Filling
3 tablespoons unsalted butter, at room temperature
1/2 cup smooth peanut butter
1 cup powdered sugar
3-4 tablespoons milk

Place racks in the center and upper third of the oven and preheat oven to 350 degrees F. Line two baking sheets with parchment paper and set aside.

Beat the sugar and butter in the bowl of a stand mixer fitted with a paddle attachment. Beat until creamy, about 3 to 4 minutes. Add egg and beat on medium speed for about 1 minute. Add the vanilla extract and beat until blended.

In a medium bowl, whisk together the oats, flour, baking powder, baking soda, spices, and salt. Add the dry ingredients to the butter and egg mixture slowly beating on low speed until just incorporated. Stir in the pecans last.

The cookies will be small, so portion about 1 heaping teaspoon of cookie dough into your hand. Roll into a ball and place on the prepared cookie sheet. Keep cookies about 1 1/2-inch apart on the baking sheet. If the cookie dough begins to stick to your hands as you’re making dough balls, rinse your hands and portion the dough with just slightly damp hands.

Bake for 10 to 13 minutes or until they’ve reached your desired doneness. I like mine a little underdone and cook them for 10 minutes. Allow to cool on the cookie sheet for 5 minutes before transferring to a wire rack to cool completely.

To prepare the filling, place butter, peanut butter, and powdered sugar in the bowl of an electric stand mixer fitted with the paddle attachment. Beat on medium speed, drizzling in vanilla extract. Scrape down the bowl as necessary. Add milk one tablespoon at a time until you’ve reached your desired consistency. The filling should be easily spreadable.

When cookies are completely cool, flip over and spread half of the cookie bottoms with peanut butter filling. Top with a similar size cookie. Wrap individually and store in the refrigerator. Cookies are best served slightly chilled.

Heather’s Helpful Hints
Make sure your butter is at room temperature, otherwise it won’t cream properly with the sugar. It should be pliable enough that your finer can leave a mark in it, without being soft and greasy. Set the butter out at least one hour in advance.


10 thoughts on “Oatmeal Sandwich Cookies with Peanut Butter Filling

  1. Oo, those look sooo good! I love the idea to make them into sandwiches! I’ve only seen that done with straight up frosting before, but yours looks like it’s a lot more peanut buttery, even though it also includes powdered sugar… yum!


    • As I was making the filling I was thinking to myself, whenever you add butter and sugar to peanut butter, the outcome can be nothing but amazing ;) I had to share these with friends just to get them out of my house!


      • I bet! And I’m sure you were right– butter+sugar+peanut butter = amazing! (Although I guess I read that so quickly the first time, I didn’t notice that there was actual butter involved too…)


  2. Every year the Girl Scouts begin to sell their cookies I will remember this post. You could be their chef and prepare all their peanut butter cookies though this recipe looks labor intensive for mass quantities.. What a wonderful tower of treats, Heather. Thanks.


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