Peanut Butter Oatmeal Cookie Sandwiches

These cookies are amazing! I found this recipe from one of my all time favorite recipe website. Annie's Eats! I made these a while back but really wanted to share them with you! I have not made them since because they are so good and I can’t just eat one at a time.
Makes 16-18 cookies
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 reduced fat creamy peanut butter
  
• ½ cup granulated sugar
  
• ½ cup light brown sugar, packed
  
• 1 large egg
  
• 1 tsp. vanilla extract
  
• 1 cup quick-cooking oats

For the creamy middle filling:

• 3 tbsp. unsalted butter, at room temperature
  
• ½ cup reduced fat creamy peanut butter
  
• 1 cup confectioners’ sugar, sifted
  
• 3 tbsp. heavy cream

Instructions:

1. Preheat oven to 350 degrees Fahrenheit
   
2. Place parchment paper or a silicone baking mat on cookie sheet.
   
3. In a bowl, mix flour, baking soda, baking powder and salt.
4. Using an electric mixer with the paddle attachment, mix together the butter, peanut butter and sugar until creamy (2-3 minutes). Add in egg and vanilla extract.
5. Add in the bowl of dry ingredients. Mix on slow speed until blended.
6. Stir in the oats.
7. Use a small cookie dough scoop to get the same portions of dough. Roll into a ball and place on cookie sheet.
8. Cook for 5 minutes then rotate cookie sheet and cook for another 5 minutes.
9. Let cool on cookie sheet for a few minutes then place them on a cooling rack to finish cooling.
10. One completely cool put the cookies in twos according to size.
11. To make the filling, place butter, powdered sugar and peanut butter in electric mixer. Mix until creamy. Add in the heavy cream and blend until smooth.
12. Using a pastry bag with a round tip or Ziplock bag fill with the peanut butter filling.
13. Swirl the filling on one cookie (flat side). Place the other cookie on top. Press down gently. Don’t put too much filling on each cookie or you may run out.