In a small bowl, combine warmed milk, a packet of active dry yeast, and 1 tablespoon of sugar. Allow it to sit for about 5-10 minutes until it becomes frothy.

In a large mixing bowl, combine 2 cups of all-purpose flour, the rest of the sugar (1/4 cup), and 1/2 teaspoon of salt. Make a well in the center and pour in the yeast mixture, melted butter, and one large egg.

Mix the ingredients until they form a dough. Transfer it to a floured surface and knead for about 5-7 minutes until the dough is smooth and elastic.

Place the dough in a greased bowl, cover it with a clean kitchen towel, and let it rise in a warm area for about 1 hour or until it has doubled in size.

After the dough has risen, punch it down and roll it out to about 1/2 inch thickness. Cut 3-inch circles using a cookie cutter.

Gather any scraps, re-roll, and cut more circles. Place the circles on a floured surface and cover them for another 20-30 minutes to rise.

Heat oil in a deep fryer or a large pot to 350°F (175°C). Carefully place a few dough circles into the hot oil, frying them in batches until golden brown—about 2-3 minutes on each side.

Once fried, place the Berliners on paper towels to absorb excess oil. Allow them to cool slightly.

Use a pastry bag or a funnel to inject your choice of fruit jam into each Berliner.

Finally, dust the warm Berliners with powdered sugar before serving.