Peanut Butter Oatmeal Sandwich Cookies

I've been slightly obsessed with both peanut butter and oatmeal lately. These cookies marry those two together beautifully. These cookies are honestly some of the best I have ever made. They are soft and the filling really pushes that peanut butter flavor over the top. They taste like a great homemade version of a Nutter Butter! Your friends will love them too. At least, that's what mine told me. :) And these cookies may look like a lot of work, but they really aren't. This recipe would also be really easy to double or triple if needed!

Peanut Butter Oatmeal Sandwich Cookies
Source: Slightly adapted from Annie's Eats, originally from All Recipes

Ingredients:

For the cookies:
¾ cup all-purpose flour
½ tsp. baking soda
¼ tsp. baking powder
½ tsp. salt
8 tbsp. unsalted butter, at room temperature
½ cup creamy peanut butter
½ cup granulated sugar
½ cup light brown sugar, packed
1 large egg
1 tsp. vanilla extract
1 cup old-fashioned oats

For the filling:
3 tbsp. unsalted butter, at room temperature
½ cup creamy peanut butter
1 cup confectioners’ sugar, sifted
3 tbsp. heavy cream

Directions:
1. Preheat the oven to 350 degrees. Spray a baking sheet with cooking spray or line with parchment paper and set aside.

2. Stir together the flour, baking soda, baking powder and salt in a small bowl.

3. In the bowl of a stand mixer fitted with the paddle attachment, cream together the butter, peanut butter, sugar and brown sugar together on medium speed until light and fluffy.

4. Add the egg and vanilla and blend to combine.

5. Add in the flour mixture and mix on low speed until combined.

6. Stir in the oats.

7. Using a small cookie scoop, portion out the cookie dough (about 2 teaspoons each) and roll into a ball. Set each cookie on the baking sheet. Bake for 10 minutes, rotating pan half-way through the baking time, until cookies are light golden brown.

8. Cool the cookies for 5 minutes on the baking sheet, then transfer to a wire rack to cool completely. Repeat with remaining dough.

9. Once cookies are completely cooled, make the filling. Cream together the butter, peanut butter, and confectioner's sugar until combined. Add in the heavy cream and mix until smooth and fluffy.

10. Pipe a dollop of frosting on the bottom of one cookie, then add a cookie of similar size to the top and press together until the filling reaches the edges. Repeat with remaining cookies.

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