Crush the lotus cookies into fine crumbs.
Mix with butter and press into the bottom of a cake pan to form the crust.
Gently blend cream cheese, erythritol, heavy cream, and vanilla extract until smooth.
Dissolve gelatin in warm water and add to the cream cheese mixture, mixing well.
Pour the batter into the cake pan and spread it evenly.
Sprinkle keto lotus cookie crumbs on top.
Chill in the refrigerator for at least 4 hours until set.