In a large mixing bowl, combine the self-raising flour, salt, and sugar. Stir well to combine these dry ingredients.
Pour the buttermilk into the bowl and add the melted butter. Mix these ingredients together until a dough forms. If the dough is a bit sticky, no worries, that's perfectly alright!
Lightly dust a clean surface with a bit of flour. Knead the dough for a couple of minutes until it becomes smooth.
Grease your potjie pot (or Dutch oven) with a bit of the leftover melted butter to prevent the bread from sticking.
Place the dough in your pot and cover it with the lid.
You'll want to bake this bread on a medium to low heat. If you're using a potjie pot, place it over a few hot coals and place a few coals on the lid as well. If you're using a Dutch oven, preheat your oven to 180°C and place your pot inside.
Bake the bread for about 2 hours, or until a skewer inserted into the middle comes out clean.
Once done, remove the pot from the heat (or oven) and let it cool for a bit.
Turn the pot upside down to remove your potbrood. It should have a beautiful golden crust and a soft, fluffy interior.
Slice it up and serve warm with lashings of butter or your favourite South African jam.