I'm needing a recipe for great shortbread. The recipe I have was given to me by a friend who used to make this & said it was her G'mas recipe--hers was by far the best shortbread I've ever had. I LOVED her shortbread, but for some reason mine does not turn out the way hers did. She has moved away & I've lost contact with her so I cannot find out what I'm doing wrong. Hers was very flaky and almost dry. Mine turns out too buttery and has little bubbles on top--hers did not. This is the recipe I have in case anyone has any suggestions on what I should do differently to maybe make this one work:

1 c. butter

1 c. sugar

Blend together.

2 c. flour

1/2 c. rice flour

Sift into butter mixture.

Knead slightly. Press into 9x13 pan and prick with fork. Bake at 300 for approximately 25 min.

Thanks for any suggestions anyone may have!