This is one of my pieced together recipes that came out great. I was supposed to be making my sisters recipe and I was doing it by memory. Well thats trouble, but it came out better than hers. Don't tell her!
Preheat oven 350. Put stick of butter in 9 x 13 pan and stick in oven till melted. In medium size mixing bowl put sugar, flour, buttermilk, salt, and baking powder. Mix until all ingredients are wet and creamy. Pour into pan with butter. Spread if necessary. Don't mix. On top of that, spoon out peach pie filling evenly and sprinkle brown sugar and nuts on top. Don't mix. Place in oven for 45 to 55 minutes. Let cool 5 minutes and serve with ice cream.