Have you eaten all your Christmas cookies yet?!!

- 300 grams (3½ cup, 10.5 oz) ground butter cookies (petit buerre, digestive, plazma) or graham crackers
- 30 grams (1/4 cup, 1.05 oz) powdered sugar (or more, depending what kind of cookies you use)
- 1 teaspoon vanilla extract
- 200 grams (7.05) cream cheese
- 3-4 Tablespoons heavy cream or milk
- 250 grams (8.8 oz) semi-sweet or dark chocolate