Mix all ingredients (except for nuts and Glaze) for 2 minutes.
Arrange nuts on bottom of well-greased (be generous) bundt pan. Pour in batter.
Bake at 325 degrees for 50 minutes, check with toothpick. May take up to 65 minutes, depending upon your oven.
Boil butter, sugar and water for 1 minute, stirring. Remove from heat and add 1/2 C rum.
Pierce top of cake with toothpick (lots of holes). Pour on glaze while cake is hot. It will absorb it all. Let cake cool in pan before removing.
If you can't find a plain yellow cake mix, you can use a cake mix that already includes pudding. You may need to adjust the liquid ratios and the temperature/baking times to coincide with the package instructions.
It's exceptionally good served with vanilla ice cream!