Preheat oven to 350.

cream together 1/2 cup softened butter, 1 cup sugar, and 2 eggs. Add 3/4 cup flour, 1/4 teaspoon baking soda, 1/4 teaspoon salt, and 1 1/4 cup crushed pineapple. (Heather did not drain the pineapple, I did, then put some of the liquid back in. With the liquid, it took 38 minutes to bake.) 

Use 8x8 or 9x9 greased pan, bake 28-33 minutes, then sprinkle with powdered sugar.