Step 1

Place the butter, granulated sugar and brown sugar in the bowl of a mixer. Beat for 2-3 minutes or until light and fluffy.

Step 2

Add the eggs and vanilla extract to the bowl. Beat until thoroughly mixed.

Step 3

In a medium bowl, mix together the flour, cornstarch, baking soda, baking powder and salt. Add half the dry mixture to the mixing bowl and mix on low speed.

Step 4

Add the remaining dry ingredients and mix on low speed until just combined. Fold in 1 cup of the M&M's.

Step 5

Cover the dough and chill in the freezer for 10 minutes.

Step 6

Take two balls of dough (1 1/2 tablespoons in size). Flatten them between your hands and place an Oreo cookie in the middle.

Step 7

Repeat the process with the remaining dough and Oreos.

Step 8

Seal the edges, then shape the cookies into discs where about 75% of the dough is on top of the Oreo and 25% of the dough is on the bottom of the Oreo.

Step 9

Place the cookies at least 2 inches apart on two sheet pans lined with parchment paper or a silicon baking mat. Freeze for 10-15 minutes or until firm.

Step 10

Preheat the oven to 350 degrees F.

Step 11

Bake one sheet of cookies at a time for 10-12 minutes or until edges are lightly browned.

Step 12

After the cookies come out of the oven, immediately press the remaining 3/4 cup of miniature M&M's over the tops of all the cookies.

Step 13

Let the cookies rest for 5-7 minutes, then transfer to a cooling rack. Serve when cooled, or store in an airtight container for up to 5 days.