Add the milk, water, eggs, flour, and salt to a blender and blend on high until smooth. Set the mixture to the side and rest at room temperature for 25 to 30 minutes.
Add the large muffin tin to an oven on a middle rack and preheat the oven to 425°. Once the oven is preheated, evenly distribute the oil between each muffin round and return it to the oven.
The oil should be pretty close to smoking. Remove the pan from the oven and pour in the batter evenly amongst the muffin rounds filling it 2/3 of the way full.