In a bowl, whisk the eggs and the pinch of salt for few minutes.
Add milk then whisk more.
Add the sifted flour and whisk until smooth.
Pour the batter in a measuring cup (for easy pouring).
Cover with plastic wrap and refrigerate for at least 30 minutes.
Put about 1 teaspoon oil in each cup of a muffin tin( about 6 cups).
Transfer the muffin tin to the oven (middle rack).
Preheat oven to 375°F with the muffin tin inside to heat up the oil.
Once the oven is ready for baking, pour the butter equally in the muffin cups(about 1/2 or 3/4 full). Make sure you give the batter a quick whisk before pouring it.
Let bake for about 20 to 25 minutes or until golden(depending on your oven, you may need to put under broiler in the last 5 minutes).
Place in a plate.
Add Nutella, jelly or anything sweet you want to eat with in the Yorkshires’ cavities.
Dust with powdered sugar.
Serve immediately.