Process Oreos in a food processor until they are crushed to a dust like powder. Mix cream cheese into dust until completely mixed. Roll mixture into golf ball sized spheres. Stick toothpicks into top of balls. Set into freezer to harden but do not freeze. Use a double boiler to melt almond bark. Add one teaspoon of cooking oil at a time to reach desired consistency. When almond bark is melted, use toothpicks to dip balls into almond bark. Completely cover balls then set them on a sheet of waxed paper to let harden; this may take up to an hour.