Pour the 1 tbsp of cold water into a small bowl and sprinbkle the gelatin over it.
Allow the gelatin to set 3-5 minutes.
In a large mixing bowl, beat the cream cheese until smooth.
Add the liquid sweetener and continue to beat.
Add the gelatin to the Irish cream and mix it in.
Add the gelatin-Irish Cream mixture into the cream cheese and mix thoroughly using a silicone spatula.
Sift the cocoa, with a small sieve or sifter and add it to the mixture, folding it in with the spatula.
Add 3 cups of the whipped topping, one cup at a time, gently folding it in until well mixed.
Pour into the prepared crust and spread evenly, smoothing out the top.
Chill for 2 to 3 hours before serving.