Mix the dry ingredients: flour, baking powder, salt, sugar, nutmeg, and white pepper.
Add the butter to the flour and mix well with a hand mixer until well incorporated.
Add the minced garlic, onions, milk, and egg, and keep mixing until it forms a sticky dough ball.
Dump the dough ball onto a floured surface and knead, incorporating more flour as needed until the dough is smooth, elastic, even in color, and no longer sticky.
Divide the dough in half. On a floured surface, roll each half about ⅙ inch thick—just like linguine or fettuccine. In fact, you can use a pasta machine if you have one. Chin chin comes in many shapes and sizes, so cut the dough into the shapes you like.
Heat about 3 inches of oil over medium heat in a saucepan or Dutch oven until it reaches 350℉ (180℃).
Gently add the chin chin and fry until golden. Remove from oil with a slotted spoon or strainer, drain, and serve. You can store chin chin in an airtight container for up to a month.