Once you've prepared the ingredients, you can start by preheating the oven to 400 degrees (F) or 200 degrees (C). Line the baking trays with some parchment paper to avoid the desserts from sticking, you can spread butter or oil on the paper too.

Next, prepare or buy the pastry (unless you're an expert)- it's better to buy shop-bought pastry for these desserts because it's easier and quicker to use. Roll the pastry onto a floured table and cut the pieces into equal portions around 1.5-inch squares. Place the pastry onto the baking sheets.

Then, bake the dough in the oven for 15-20 minutes until the color is golden and crispy.

Place the baked dough somewhere to cool (preferably on a metal wire rack) for 5-10 minutes. Slice the dough into halves.

Finally, spread caramelized milk or jam (also known as dulce de leche) onto half of the pastry squares and place the squares on top.