Rugelach

Place the first four ingredients in a food processor or standing mixer and mix until combined.
Slowly add the flour, little by little until just combined.
Divide the dough into 2 balls, wrap each with plastic wrap and refrigerate for 1 hour.
Preheat the oven to 350°F.
On a lightly floured surface, roll each dough ball into a 9 inch round and using a pizza cutter or knife, cut into 8 equal wedges (like a pizza pie).
Before separating the wedges evenly spread the round with 2 tbsp preserves or other 1/4 cup filling of choice. Press them dough gently to adhere to the dough.
Starting with the wide end of each wedge, roll up into 16 cookies.
Place on a baking sheet with the tip pointing down and brush with egg wash (optional).
Bake for 20-25 minutes or until golden.