Step 1

Preheat the oven to 350°F.

Step 2

In a mixing bowl, beat the margarine, sugar, brown sugar, milk, and vanilla.

Step 3

In a separate bowl, whisk the flour, baking soda, salt, and cornstarch.

Step 4

Add the flour mixture to the wet mixture. Mix until combined.

Step 5

Fold in the chocolate chunks.

Step 6

Grease a muffin pan. For each cookie, press 1.5-2 tbsp of dough into the bottom of the muffin cup. Place a chocolate sandwich cookie on top, then top the cookie with 1-2 tbsp more dough.

Step 7

Repeat, using as many muffin pans as necessary (this will make about 20-24 cookies, depending on how much dough you use per cookie).

Step 8

Bake the cookies for ~14-16 minutes (this will vary depending on how much dough you use per cookie, so keep an eye on them to ensure they don't overcook - if you use less dough you'll want to decrease the time).

Step 9

Allow to cool slightly before removing from the pan. Enjoy plain or with a scoop of ice cream!