First, twist the Oreo cookies apart.

Using a knife, make a small hole in the filling where the stick will fit.

Place the cake pop stick in the indentation and spread the removed filling around the stick to hold it in place.

Melt some of the chocolate or candy melts you will be decorating your Oreos with and pipe/spoon it over the Oreo filling.

Place the other cookie on top and press down gently. Just let the chocolate set and your cake pop will be stuck firmly between the two cookies.

How easy is that! If you follow this simple step-by-step plan, your Oreo will be firmly attached to the stick and will not come loose when you dip the Oreo in the chocolate afterwards.