Combine warm milk, vegetable oil, sugar, egg, instant yeast, salt, and cardamom in a large bowl. Gradually mix in flour 1 cup at a time until the dough is easily handled.

Knead the dough on a flat surface until it becomes non-sticky. Return to the bowl, cover, and let it rise in a warm place until doubled in size, about 1 hour.

Press the dough down gently, knead briefly again, and divide it into 4 equal portions. Roll each portion into a ball, keeping them covered to prevent drying.

Roll out one dough ball on a floured surface into a 1/3-inch-thick circle and cut into 4 triangles. Repeat for the other dough balls, keeping them covered.

Heat 2 inches of oil in a deep fryer or large saucepan over medium heat.