• In the mixing bowl of a stand mixer, place the Butter, Sugar, Brown Sugar, and Eggs, and mix until smooth and well blended.
• Add the Peanut Butter and mix until smooth and creamy.
• In a separate bowl, add the Flour, Baking Powder, Salt, and Baking Soda, and stir well until completely combined.
• Add the Flour Mixture to the Mixing bowl, a little at a time until all the flour is added, and well mixed.  Scrape down the sides of the mixing bowl, and blend until smooth.
• Remove the mixing bowl, and roll the Cookie dough into small, 1" balls, and place on a Parchment lined Cookie Sheet.
• When the Cookie Sheet is full of the Cookie dough balls, dip the Tines of a Fork in Sugar, and make a criss-cross pattern on the top of the cookies, pressing them down lightly with the fork. Repeat until all Cookie dough has been used.
• Place the Cookies in the Oven at 350 for about 15 minutes, or until the edges are golden brown, and the cookies are crunchy on the bottom.
• Remove the cookies to a wire rack to cool completely.
• While the cookies are cooling, make the filling.

Filling:

• In the mixing bowl of a stand mixer, place the softened Butter, and Cream Cheese, and blend until smooth and creamy.
• Add the Maple Syrup, and mix well.  Scrape down the sides of the mixing bowl, and mix again.
• Add the Powdered Sugar a little at a time, mixing between additions, until all the Powdered Sugar has been added, and the filling is thick and creamy.
• Place the filling in a Pastry bag with a medium-size fluted tip.
• Lay the cookies on a piece of Parchment paper, in pairs.
• Pipe the filling onto the inside, or flat side of a cookie, with a swirl motion, making sure to pipe at the edge of the cookie, so the fluted filling is visible.
• Place another cookie, flat side down on top of the filling, so that the 'criss-cross' top is showing on the top of the Cookie sandwich.
• Continue until all the cookie sandwiches have been filled.   Serve, and Enjoy!