Add in the flour, sugar, lemon zest, and sugar and whisk until there are no lumps.
Place Cast Iron Skillet into the preheated oven with the butter
When the butter is melted, carefully pour dutch baby batter into the skillet and bake for 15 minutes
Lemon Glaze
Combine Lemon Juice, Milk and powdered sugar until a glaze forms. If the mixture is too dry add in more milk and lemon juice until you get the consistency you want.