1Beat egg yolks. Add sugar, lemon juice, and melted butter; mix well. Stir in flour and milk.
In separate bowl, Beat egg whites until they form stiff peaks; fold into the first mixture. Pour into unbaked pie crust and bake at 425 degrees for 10 minutes. Reduce heat to 325 degrees and continue baking for 35 minutes.
Spread butter on both sides of knife when cutting a meringue pies.