Preheat oven to 350 degrees and butter and flour three 8-inch round pans
Combine ALL dry ingredients in a bowl and set aside
Combine ½ cup of milk and ½ cup of vegetable oil in a separate bowl and set aside
Combine remaining milk, eggs, and vanilla in a separate bowl
Add room temperature butter, in chunks, to the dry mixture and blend until combined. Mixture should look crumbly. This should take about two minutes
Add the milk and oil mixture into the dry ingredient/butter mixture and mix on medium speed for about 2 minutes. You will see the mixture increase in volume and look fluffy. This will ensure that the cake rises properly
Add ½ of the milk/egg/vanilla mixture and mix until combined. Then add the remaining liquid and mix until combined
With a rubber spatula, fold in the 1½ cups of crushed Oreo Cookies
Divide mixture evenly between the three prepared pans
Bake the cakes for approximately 30 minutes, checking for doneness at 25 minutes.
Remove cakes from oven and let cool in pan for 10 minutes before transferring to a wire rack to cool completely