Step 1: Preheat Your Oven - Start by preheating your oven to 350°F (175°C). This ensures that your cookies will bake evenly.
Step 2: Cream the Butter and Sugars - In a large mixing bowl, use an electric mixer to cream together 1 cup of unsalted butter, 1 cup of brown sugar, and 1 cup of white granulated sugar until the mixture is light and fluffy.
Step 3: Add Peanut Butter and Eggs - To the creamed mixture, add 1 cup of creamy peanut butter and mix until smooth. Then, add 2 large eggs and 1 teaspoon of pure vanilla extract. Beat until fully incorporated.
Step 4: Combine Dry Ingredients - In a separate bowl, whisk together 2 1/2 cups of all-purpose flour, 1 1/2 teaspoons of baking soda, 1 teaspoon of baking powder, and 1/2 teaspoon of salt.
Step 5: Mix Dry Ingredients into Wet Ingredients - Gradually add the dry ingredients to the wet mixture, mixing on low speed until just combined. Be careful not to overmix, as this can lead to tougher cookies.
Step 6: Scoop and Bake - Using a cookie scoop, drop rounded tablespoons of dough onto a baking sheet lined with parchment paper, spacing them about 2 inches apart. Bake in the preheated oven for 10-12 minutes, or until the edges are lightly golden.
Step 7: Cool the Cookies - Once baked, remove the cookies from the oven and allow them to cool on the baking sheet for about 5 minutes before transferring them to a cooling rack to cool completely.
Step 8: Make the Filling - While the cookies cool, prepare the filling. In a mixing bowl, beat together 1/2 cup of cream cheese, 1/2 cup of marshmallow cream, and 1/2 cup of Nutella until smooth and creamy.
Step 9: Assemble the Sandwiches - Once the cookies are completely cool, spread a generous layer of the Nutella marshmallow cream filling on the flat side of one cookie and top it with another cookie, flat side down. Press gently to adhere.
