Contributed by a Helen. Thanks for sending this in!
You won't need a rolling pin for this old favorite ~ the base is just pressed into the pan. (and yes the Irish do add oats in the filling.)
Cut butter into flour and brown sugar until crumbly; press into greased 9-inch square pan. Bake at 350 F (180 C) for 15 minutes.
Combine all ingredients well and pour over the baked base.
Return to oven and bake for 20 to 25 minutes.
Cool before cutting into squares.
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