Start by mixing all of the dry ingredients together until they are well combined. Then, add cold butter chunks to the flour mix and rub the butter and flour together using your fingertips. The mixture should look like breadcrumbs. Next, mix the wet ingredients together (egg and milk) in a separate bowl. Pour the wet ingredients into the butter and flour mixture and mix it with your hand or a knife until the mixture forms a dough. Once the dough has formed dust flour on a surface and knead the dough until well combined. Then, use a rolling pin to flatten the dough. It should be about 1/5 inches thick. Use a pizza cutter to cut the chin chin and cook in hot oil until golden brown.