4 and ½ cups of flour2 medium eggs1/2 cup of unsalted butter1 teaspoon of lemon zest1/2 cup of sugar2 tablespoons of instant dry yeast1/2 cup of warm water1/4 cup of warm milk1 pinch of saltTopping1/2 cup of grated coconut1/2 cup of sugar1 teaspoon of vanilla extract1 teaspoon of flour2 medium eggs1 yolk1 tablespoon of waterPowdered sugar (to taste)