In a medium bowl, combine the flour, baking powder, baking soda, salt and sugar.
Using your hands, blend in the shortening and butter, until incorporated.
Whisk together the yogurt and milk. Add it to the flour with the cheese and chiles. Stir gently with a spoon.
Once everything is semi-combined, dump the batter onto the counter. Gently knead with your hands, until everything is blended.
Shape together into a flat loaf that is about 1 1/2 inches tall.
Using a circle cutter or glass, cut into circles. Place on a lined cookie sheet.
Brush with melted butter. Sprinkle with salt.
Refrigerate for at least 30 minutes.
Bake in a 375F-degree oven for 12-15 minutes, until golden.