Time 1h34m Yield 16 Number Of Ingredients 13 Steps:
Line 2 baking sheets with parchment paper and spray with cooking spray. Beat brown sugar, butter, and white sugar together in a bowl using an electric mixer until smooth and creamy, about 5 minutes. Scrape down sides of bowl a few times. Continue beating mixture while adding eggs, 1 at a time, beating well after each addition. Add vanilla extract and mix well. Whisk flour, baking soda, and salt together in a separate bowl. Slowly add flour mixture to creamed butter mixture while beating on low speed until dough is just mixed. Fold oats and butterscotch chips into dough. Scoop 32 balls of dough using a large cookie scoop and arrange on the prepared baking sheets. Spray the bottom of a broad, flat glass or bowl with cooking spray and press onto each dough ball to flatten. Place a chocolate sandwich cookie on top of 16 flattened dough balls and cover with remaining 16 flattened dough balls, sealing the edges together with your fingers. Transfer stuffed cookies to a container or tray and cover with a lid or plastic wrap. Refrigerate at least 1 hour to overnight. Preheat oven to 375 degrees F (190 degrees C). Line baking sheets with parchment paper. Arrange cookies on the sheets with no more than 6 per sheet; top with a sprinkling of flaked salt. Bake 1 tray at a time in the preheated oven until golden brown, 14 to 16 minutes. Cool on the baking sheet for 1 minute before transferring to a wire rack to cool.
Time 3h Yield 12 cookies Number Of Ingredients 14 Steps:
Prepare the cookie dough: In the bowl of a food processor, combine the butter and both sugars and process until combined. Add the egg and vanilla and pulse to combine, scraping down the sides of the bowl with a rubber spatula as needed. Add the oats, flour, baking powder, cinnamon and salt, and process until combined and the oats have broken down a bit, scraping down the sides of the bowl occasionally. Transfer the dough to a large piece of plastic wrap and use the sides of the plastic to shape it into a flat, 8-inch square that is about 1/2-inch thick. Chill until firm, at least 2 hours. Prepare the filling: Heat the cream in a small saucepan or in a bowl in the microwave until hot. (Be careful: Cream loves to boil over.) Add the chocolate, vanilla and salt to the hot cream and let stand 2 minutes, then stir until smooth and uniform. (If not fully smooth, carefully heat a bit longer on the stovetop, stirring until smooth, or heat in the microwave in 5-second spurts, stirring after each blast, until smooth.) Transfer the filling to a large piece of plastic wrap and use the sides of the plastic to shape it into a 4- to 6-inch square. Chill until firm, at least 2 hours. Heat the oven to 375 degrees. Line two rimmed baking sheets with parchment paper. Cut the cookie dough into 24 equal pieces. Cut the chocolate filling into 12 equal pieces. (It’s OK if the chocolate breaks a bit; just make sure you have 12 equal piles.) Flatten one piece of cookie dough slightly. Set a piece of chocolate filling into the center. Flatten another piece of cookie dough and set it on top of the chocolate filling. Use your hands to shape the cookie dough around the filling and then roll it into a neat ball. Repeat with the rest of the dough and filling. Set 6 dough balls onto one of the prepared sheets. Bake until set and relatively flat, with just-golden edges, 14 to 16 minutes. Let cool for 5 minutes on the baking sheet, then transfer to a rack to cool completely. Repeat with the remaining cookies on the other baking sheet. Serve cookies warm or at room temperature.
