• Preheat oven to 350 degrees.
• Pour milk and vinegar together and let set.
• In a bowl, add flour, baking soda, baking powder, cocoa powder, salt, cornstarch, and both sugars. Stir everything together.
• In a separate bowl, combine milk mixture with eggs, oil, mayo, and vanilla extract. Whisk to combine.
• Add wet ingredients to dry ingredients.
• When the mixture is halfway mixed, add in the warm water.
• Once everything is fully mixed, use a medium sized cookie scoop to scoop the batter into cupcake liners, about 2/3's of the way full.
• Bake for about 18-22 minutes, then let cool.
• While the cupcakes cool, make the frosting.

Making the Frosting.

• Crush up chocolate sandwich cookies until you get about a cup of cookie crumbs.
• Add heavy cream to a bowl, and mix on medium speed until you get soft peaks.
• Add in vanilla, powdered sugar, and pudding mix.
• Whip for another minute.
• Add in cookie crumbs and use a spatula to fold in gently.
• Add frosting to a large piping bag and pipe a large dollop on top of the cupcakes.
• Add a few more cookie crumbs and enjoy!