Good-Cooking - Lemon Gold Cake

Ingredients

• 2 1/4 cups cake flour
• 1 1/2 cups granulated sugar
• 1 tablespoon baking powder
• 1 teaspoon salt
• 1/2 cup vegetable oil
• 6 eggs, separated
• 3/4 cup cold water
• 2 teaspoons lemon juice
• 1 teaspoon grated lemon rind
• 1/2 teaspoon cream of tartar
• 1 cup granulated sugar
• 3 tablespoons all-purpose flour
• 1/3 cup lemon juice
• Grated rind of 1 lemon
• 1 teaspoon lemon extract
• 4 egg yolks, beaten
• 1/2 cup water
• 3 tablespoons butter
• Dash of salt
• 1 cup coconut (optional)