1Preheat oven to 350^.
Melt butter in 3 quart saucepan. Remove from heat.
Add ice cream, then eggs, flour, sugar,baking powder, salt and graham cracker crumbs.
Mix until smooth.
Pour into greased 13x9-inch baking pan.
Bake for 30-35 minutes.
Combine sour cream and ice cream topping.
Pour over warm cake. Top with pecans.
Cool; cut into squares. Serve with ice cream or whipped cream ,if desired.
When I made this I used butter Pecan ice cream- oh so good.! Say wouldn't this be good with pumpkin ice cream. If you can't find it just use pre-mixed pumpkin to vanilla ice cream -let set up a bit then proceed following the above directions- This is going to be delicious. I'm writing this in my Thanksgiving menu.