1. Preheat the oven to 350°F.
2. In a mixer, combine the butter and sugars until the mixture is fluffy. Add the egg and vanilla; mix.
3. Add the flour and baking powder; mix quickly. Finish with the chocolate chips and mix gently.
4. Form small balls of dough. Place on a baking sheet lined with parchment paper.
5. Bake for 12 minutes.
6. Remove from the oven and let cool on a rack.
7. In a small bowl, whip the cream cheese and mix with the lemon juice and zest. Add the powdered sugar and whip for 2 minutes.
8. Top one of every two biscuits with this mixture and top with another biscuit.
9. Repeat for all biscuits and serve.