Buttery Lemon Bars

I've been making these for 30 years from this recipe.
They are so delicious. I always make four batches.
I use two batches in a 9 x 12 pan and they are just right.
Everyone requests them and they get eaten up fast.

Ingredients:
1/2 cup butter, softened
1 1/3 cups all-purpose flour
1/4 cup white sugar
2 eggs
3/4 cup white sugar
2 tablespoons all-purpose flour
1/4 teaspoon baking powder
3 1/2 tablespoons lemon juice

Directions:
Preheat oven to 350 degrees F.
To make crust:
Mix together the butter, 1 1/3 cups flour
and 1/4 cup sugar with a fork until crumbly.
Press into an 8 inch square pan
and bake for 20 minutes.
Crust will look white. Do not brown!
Combine the eggs, 3/4 cup of sugar,
2 tablespoons flour, baking powder
and lemon juice in a blender.
Blend until well mixed.
Pour over pre-baked crust.
Return to oven and bake an additional 20 minutes.
Remove from oven and sprinkle with powdered sugar.
Let bars cool before cutting.