Quicky - Peanut Butter Chocolate Sandwich Cookies

I'm regularly using the cookie-dough in this recipe as a cocoa-pie-crust-dough. 
The peanut-butter sandwich cookies are a simple way of using this pie-crust-dough's leftovers. 
You are, of course, more than welcome to use all of the dough only for making these cookies :)

The cookie-dough recipe is based on a chocolate "porcupine" recipe by Micky Shemo.

Peanut Butter Chocolate Sandwich Cookies
Yields: 30-35 2-inch-diameter cookie-sandwiches

WHAT:
for the cookies:

• 70 grams sugar
• 113 grams (1 stick) unsalted butter, cold, cubed
• 1 egg
• 210 grams all-purpose flour
• 10 grams unsweetened cocoa powder
• 1/2 tsp baking powder

for the filling:

• Room temperature peanut-butter

HOW:

• Preheat oven to 340 degrees (F). 
• Sift flour, cocoa powder and baking powder into a large bowl.
• In a food processor or a mixer with a flat beater, mix together butter and sugar until well combined. 
• Add in egg and a quarter of the flour/cocoa mixture. Mix for a few seconds. 
• Add in the rest of the flour/cocoa mixture. Mix until a large dough-ball is formed, not beyond. 
• Form the dough into a 1/2 inch thick disc shape. 
• Wrap the dough in plastic wrap, and refrigerate for 30 minutes (or more). 
• Remove dough from plastic wrap, and knead/mold a little with your hands, to warm it up a bit. 
• Using a rolling pin, flatten the dough to be about 3-4 mm thick on a generously-flour-dusted surface. 
• Using a cookie-cutter in any shape/size you like, cut cookies out of the dough.
• [Optional] Using a round pastry-bag tip or a small round cutting tool, remove the center of half of the cookies. 
• Place all cookies in a single layer on a cookie sheet lined with parchment paper.
• Bake cookies for 10-12 minutes. 
• Remove cookie sheet from the oven, and let it sit in room temperature to allow cookies to cool down. 
• Using a tiny pastry bag, or two teaspoons, place a small "blob" of peanut butter in the center of each cookie that does not have a hole in it / half of the cookies. 
• Create cookie sandwiches by placing a cookie with a hole in it / "clean" cookie over each "blob"ed cookie. 
• Enjoy!

Leftovers? Keep the cookies in room temperature in an air-tight container / cookie jar.