Twist the Oreo cookies, scoop out the filling and place in a medium size bowl. Set aside.
Place the Oreo cookie shells into a food processor and blend until a soft powder forms.
Heat a small sauce pan to low and add the butter until melted.
Add the sweetened condensed milk, evaporated milk and oreo filling and stir until blended.
Pour 1/2 Cup of the liquid into the cookie crumbs and stir. Repeat until the mixture is wet enough to stick together. Don't over do it, it you prefer thicker cookie butter. Keep adding liquid if you prefer thinner cookie butter.
Place the cookie butter into the refrigerator for two hours.
Check the consistency. If you prefer a thinner cookie butter add water 1/8 teaspoon at a time until you reach your desired consistency.