I made this up once because I didn't have any pineapple and wanted to make a quick cake that I didn't have to frost. Our family loved it, and it was even requested to be included in one of our church cookbooks. It's printed in Bread From House To House, 1994.
Spray a 9x13-inch cake pan with cooking spray. Melt the butter in the bottom of the pan in a 350° oven. When butter is melted (but not browned), sprinkle evenly with the pecans and all the brown sugar. Set aside.
Keep oven at 350°F. Prepare cake batter according to the package directions. Pour batter carefully over the pecan mixture. Bake 30-35 minutes until cakes tests done. Let cool 15 minutes in pan. Invert cake onto large serving platter. Scrape off any praline mixture from bottom of pan and spread evenly over top of cake. Serve warm.