Pre-heat oven to 350ºF. Make cake mix as directed by combining the mix, eggs, oil and 1 ¼ cups water in a large bowl.
15.25 ounces funfetti cake mix, 3 eggs, ½ cup vegetable oil
Grease the bottoms and sides of each cup of a muffin pan. Press about 1 tablespoon of cookie dough into the bottom of each section.
18 ounces chocolate chip cookie dough
Place an Oreo on top of the cookie dough.
36 Oreos
Using cookie scoop or large spoon, scoop the cake batter and place on top. Batter should fully cover the Oreo (push batter into any cracks and crevices).
Bake for 18-23 minutes, or until a toothpick inserted at the center comes out clean.
Let cakes cool for at least 15 minutes. Use a toothpick or scraper to gently extract them from the muffin pan. Frost the tops and coat with sprinkles (if desired).
sprinkles, 16 ounces vanilla frosting
Video
Notes
If you don't want to make all 36 cupcakes, you can make 24 (or fewer) and then pour the rest of the cake mix into a loaf pan and bake at 350 degrees for about 20 minutes (until a toothpick inserted in the center comes out clean).
To make your frosting take less like store-bought, mix in about 1 teaspoon vanilla extract and a generous pinch of salt before frosting your cupcakes.
To more easily remove the cupcakes from the muffin tins, slide a scraper around the outside of each cupcake, using an up and down movement to reach down to the bottom of each cup.
You can use cupcake liners if desired for easier removal and cleanup.