It took me a couple of years to weasel this secret family recipe out of a friend... you simply MUST try it... immediately!
Courtesy of: Angela F.
Preheat oven to 350F
Grease 11x13 cake pan & sprinkle 1 tbsp cake mix to "dust" pan
1 box white cake mix
1 jello pistachio pudding mix
1/2 cup oil
3/4 cup water + 1 tbsp
1-2 cups pecans, finely chopped (or your favorite nut)
Mix ingredients until smooth, and pour mixture into prepared cake pan. Sprinkle 1-2 cups finely chopped pecan pieces evenly over cake. (If you don't like pecans, I would expect that any nuts would work beautifully here.) Bake at 350F for about 45 minutes or until toothpick inserted comes out clean.
2 tbsp butter
1/4 cup water
2 cups packed powdered sugar
1/2 tsp vanilla
Mix ingredients while cake is in the oven. When cake is done, remove it from oven. With a fork, puncture the cake several times until surface is evenly "poked". Gently spoon frosting mixture evenly over entire cake (pouring on frosting makes it pool & doesn't coat evenly). Bake the cake for an additional 5 minutes so the frosting becomes flakey. Cool to room temp and enjoy!
** I considered warming the frosting ingredients before putting them on the cake and to make sure they mix evenly... we didn't do it, but I wonder if it might work better than ours did.