Mix together the self-rising flour, warm milk, melted butter, and granulated sugar until a ball forms. If your dough is too dry, add a tiny bit of additional milk at a time. If your dough is too wet, add a tiny bit of self-rising flour at a time. Cover with plastic wrap and set aside for 15 minutes.

Turn onto a floured surface and knead several times. Divide dough into 8 equal pieces. Flatten each piece into a thin circle.

Heat about 1/2 inch of vegetable oil in a cast iron skillet or heavy pot to 365˚F (use a thermometer and maintain an even temperature).

Use tongs to carefully add dough rounds (1 or 2 depending on the size of your pan) to the hot oil. Fry for about 1 minute on each side until golden brown.

Drain on a paper towel lined plate. Sprinkle with cinnamon sugar while warm.