Drain pineapple well, reserving 1/2 Cup of juice.

In a large mixing bowl, beat butter and sugar until light and fluffy. Beat in egg, crushed pineapple and reserved juice. (Mixture will be very wet).

In a medium bowl, combine oats, flour, baking powder, cinnamon, salt, and raisins. Stir into pineapple mixture.

Drop by heaping tablespoonfuls onto greased baking sheets. Bake at 300 for 20-25 minutes or until golden. Remove to wire racks to cool. (Unfortunately I didn't copy down the oven temp when I copied the recipe. I played with it a bit and found 300 to work well for me, even though it seems a bit low).