Cream Pie Bars with fluffy filling made of yogurt and sour cream with wonderful lemon flavor.
In a large bowl, mix yogurt with sour cream, sugar, lemon zest,vanilla and flour. Gently fold in egg whites.
Bake for about another 30 minutes or until top is golden. Check with toothpick whether the filling in the middle is cooked.
Cool Cream Pie Bars to room temperature and put in the refrigerator for at least 2 hours. Serve chilled.
* I usually bake Cream Pie Bars in 20 cm (8 inches) x 36 cm (15 inches) baking dish. The depth of the dish is 5 cm (2 inches).