Cookies and Cream Bundt Cake

box white cake mix (I used Duncan Hines but you can use this scratch recipe), plus ingredients to make the cake (likely 3 egg whites, water, and oil)

Oreo Cookies (from a 14.3-ounce package), quartered; plus more for garnishing

storebought whipped fluffy white frosting

OR

(half of 1 stick) unsalted butter, softened

about 2 to 2 1/4 cups confectioners’ sugar

to 3 teaspoons cream or milk