Preheat oven to 350° and grease and flour a bundt pan. Add chopped walnuts to bottom of pan.
In a large bowl, whisk together cake mix and pudding mix. Add eggs, melted butter, water, and rum and mix until combined.
Pour batter into bundt pan and bake until a toothpick inserted in the middle comes out clean, 1 hour. Let cool 10 minutes then invert onto a cooling rack.
While cake is still warm, make glaze: In a medium saucepan over medium heat, melt butter, sugar, rum, and water. Let boil for 5 minutes.
Poke cake all over with a toothpick then brush cake with glaze. Let glaze soak in and repeat until you’ve used all glaze.
Recipe by The Best Video Recipes for All at https://recipes-for-all.com/rum-cake/