1 box white angel food cake

DOUBLE LEMON FILLING:

1 sm. box lemon instant pudding, sugar free is o.k.
1 1/4 c. cold milk
8 oz. lemon yogurt
8 oz. Cool Whip

Prepare cake; bake and cool. Make filling at least 1 hour before using. Beat pudding mix with milk according to package. Fold in lemon yogurt until blended. Cover and refrigerate at least 1 hour until mixture is spreading consistency. To assemble, slice cake horizontally into 3 layers. Put 1 layer on serving plate, spread with half the filling. Repeat with second layer and remaining filling. Top with last layer. Frost top and sides with whipped topping just before serving.