In a stand mixer bowl, place the melted butter and sugar.
With the flat beater attachment, beat the butter and sugar.
Add the egg and vanilla and continue beating until unified.
Add the flour and mix for a couple minutes until the batter becomes dough (make sure you don’t mix for too long otherwise the dough will turn tough).
With your hands, create a single ball of dough and wrap with plastic.
Let the dough rest for 1 hour in the fridge.
Set the oven to 170°C / 350°F with the fan.
On a floured surface, roll the dough until it is ¼ to ⅜ inch thick.
Cut the dough with cookie cutters in various shapes to your liking. Then on a baking pan with a baking sheet, place the cutouts 1 inch apart.
Bake the cookies for 10-12 minutes or until edges are golden.
Cool the cookies at room temperature.
Melt a few cubes of chocolate in a piping bag that has been sitting in a glass of boiling water.
Cut a small hole at the end of the piping bag and decorate the cookies as you like.
Sprinkle the sprinkles on the chocolate while it is still wet.
Let the decorations set on the cookies.
Have a cookie and happy Hanukkah!