lemon squares with fresh raspberries and blueberries

Lemon Bar recipe from Best of Bridge - it appears in older posts.  I made the recipe and added the fresh blueberries on one side and the  fresh raspberries on the other.  When I prepare the lemon layer, I leave the baking powder/flour mixture until I take the crust out of the oven.  I whip the eggs and sugar and whip again while adding the lemon juice. I make the mixture frothy.  I add lemon zest to the crust as well as the filling.