In another bowl mix with your hands cubes of butter, flour and sugar until the consistency of flour.
Make a little space in the middle of the mixture. Pour milk, vanilla syrup, and lemon juice. Start working on the dough by slowly adding more and more flour. The final consistency should be wet cookie dough. The dough should be sticky, so you can form it into the shape of flat dough. If your dough is too wet, add more flour. If it's too dry, add more milk.
Pour filling into the flan pan. You should leave at least 2 cm space from the top of the flan pan. No worries, you can eat the filling with a fork with a scoop of ice cream. Put flattened dough on top of the cobbler.
Bake for 35-45 minutes – when the dough starts to get brown. Take the cobbler out of the oven and let cool completely. Serve with a scoop of ice cream.