Start by adding in your unsalted butter + powdered sugar into a stand mixer mixing bowl. Cream the butter and sugar together until everything is well mixed together (approximately 1-2 minutes).
Now add in your evaporated milk and then mix everything together until the milk is incorporated with everything (approximately 1-2 minutes).
Now add in your milk powder, bread flour, and cake flour to the bowl. Mix everything together until you don’t see anymore white flour spots (about 2-3 minutes). Don’t overmix the dough, otherwise it will become tough!
After mixing the dough, take it out of the stand mixer and wrap it in some plastic wrap, and set it aside. Let the dough rest for 15 minutes.
After 15 minutes have passed, weigh out the dough and then divide it into 10 pieces (approximately 25g per piece).
Now, take each piece of dough and roll it into a round ball. Sprinkle a little bit of flour on the dough balls so they don’t stick together, and then cover them with some plastic wrap to prevent them from drying out.
Now, grab some cold or room temperature butter and grease your egg tart molds so that the dough won’t stick to them after baking, and then set the egg tart molds aside. I’m using 7-7.5cm egg tart molds in this recipe here. If you use larger ones, then your egg tart shells will be thinner!
Next, sprinkle a little flour on your countertop.
Then, grab 1 piece of the dough balls and flatten them on top of the flour. Place the dough in the middle of the egg tart molds.
Now press down with each thumb while rotating the tart mold in either a clockwise or counterclockwise motion, while slowly pushing up and spreading out the dough until it covers the whole tart mold. The top of the dough should be only slightly higher than the top edge of the tart molds.
When done shaping all of the tart molds with the dough, place them onto a baking tray and then place the tray in the fridge.