Vanilla Cupcakes with Lemon Filling and Meringue Frosting

CUPCAKES
1 1/2 cup cake flour
1 1/2 tsp baking powder
1/4 tsp salt
1 stick butter, room temp
1 cup sugar
2 eggs
1/2 tsp vanilla
1/2 cup milk

Mix flour, baking powder, and salt.  Beat in butter gradually.  Beat in sugar and mix thoroughly.  Beat in eggs, then vanilla and milk.  Beat just until mixed. Pour into lined cupcake pan. Bake at 400 for 20 minutes, or until toothpick comes out almost clean.

FILLING
1 egg and 1 yolk
juice of 1 lemon
1/2 stick butter
1/2 cup sugar

Beat egg and yolk in metal bowl set in simmering water.  Beat in lemon, butter, and sugar.  Stir over medium heat until the mixture has consistency of pudding.

FROSTING
5 T water
1/4 tsp cream of tartar
1 1/3 cup sugar
2 egg whites
1 T light corn syrup
1 tsp vanilla

Beat together water, cream of tartar, sugar, egg, and syrup at low speed in metal bowl set in simmering water.  When mixture reaches 140 degrees, beat on high for 5 minutes.  Remove from heat, add vanilla, and beat for 3 minutes.