Whisk eggs, yolks, vanilla, and all milks together in a large bowl.
Cook sugar and water together in a saucepan over medium high heat to carmel color. Immediately when done pour into your pan that your going to use for your flan.
Pour egg and milk mixture on top of the carmel sugar and cover with aluminum foil. Bake in a water bath at 350 for 1hr. 20min. or till a tooth pick comes out clean making sure not to over bake. Let sit for at least 2hrs. refrigerated. Then, tip upside down and let carmel run down sides. Slice and serve.