Espresso and Lime

0 Place a 10 or 11 inch skillet or oven proof baking dish onto the center rack of your oven and preheat your oven to 425 degrees
1 Combine 1/2 cup of all purpose flour, 2 tablespoons of granulated sugar, 4 large eggs, 1/2 cup of whole milk, 2 teaspoons of vanilla extract, 1 teaspoon of fresh lemon zest and a pinch of salt in a blender and blend until all of the ingredients are fully incorporated and frothy
3 Once the oven is preheated, carefully transfer the preheated skillet onto a heat proof surface and shut the oven door to maintain the internal temperature 
4 Add 3 tablespoons of butter into the hot skillet and carefully swirl to coat the entire interior surface
5 Pour the batter into the skillet and immediately return the skillet to the oven
6 Bake for 18-20 minutes or until fully puffed and golden brown
7 Transfer the skillet onto a heat proof surface and serve immediately