Cream butter, cream cheese, and sugar until soft. Add in the flour and mix to make a soft dough.
Divide dough into 4 equal balls, flatten each one and wrap in wax paper. Refrigerate for half hour.
Preheat oven to 375 F
Take dough out from the fridge and roll thinly on a lightly floured surface. Slice the dough with a sharp knife or pizza cutter into quarters and then each quarter into 4 equal sections, to form 16 triangles. Place filling then starting from the base of each triangle, roll up to form spirals. You can curve them into crescents if you like.
Take another dough, roll thinly again, shape with cookie cutter (I used heart shape and star shape). Shape as well the filling if you like to make it even with the cookie dough and cuter! (see picture. Do the same for the other balls of dough, shape either crescents, hearts, stars, any shape you wish :)
Beat the egg white mix with milk, and brush each ready to bake cookies. Bake cookies until just golden.
While waiting cookie to cool down, melt chocolate chip. Cover or decorate cookies with melted chocolate, sweetened condensed milk, sprinkle with chocolate rice, or anything you desire ^_^