Make the cookie dough

• Put the vanilla cake mix in a bowl, ignoring the box instructions.
• Add the oil and eggs (or unsweetened applesauce instead of the eggs).
• Mix until well combined.

Chill the dough

• Cover the dough and refrigerate until firm.

Prepare the Oreos

• Set aside the 8 best-looking mini Oreos for decoration.
• Crush the remaining mini Oreos into decent-sized chunks, not dust.

Add the crushed Oreos

• Mix all but about half a cup of the Oreo crumbles into the chilled dough.

Shape the cookies

• Divide the dough into 8 large portions.
• Roll each into a ball and flatten slightly into thick pucks.

Bake

• Place the cookies on a parchment-lined baking sheet.
• Bake at 350 °F (175 °C).
• Tap the baking sheet on a towel a couple of times to flatten the cookies, then let them cool completely.

Make the Oreo frosting

• Whip the vanilla frosting on high speed until light and fluffy.
• Fold in the remaining Oreo crumbles.

Frost and finish

• Frost the cooled cookies with the Oreo frosting.
• Press parchment paper on the tops to smooth them, then freeze briefly to set the frosting.
• Remove the parchment and press a mini Oreo into the center of each cookie.