Butter the bundt pan, coating it very well. [Optional to flour it as well.]
Sprinkle the nuts on the bottom. Sprinkle the chocolate chips on top of the nuts. Set aside.
In a large mixing bowl, add the cake mix, pudding mix, ½ cup butter, eggs, sour cream, ½ cup rum, and vanilla. Mix well with a hand mixer until combined for about 2 minutes.
Pour the batter into the prepared bundt pan (on top of the nuts and chocolate chips) and bake for 45- 50 minutes or until a toothpick inserted into center comes out clean. Allow the cake to cool in the pan until the sauce is made.
Make the sauce:
Immediately make the glaze by bringing 4 Tbsp butter, ½ cup rum, and ½ cup sugar to a boil. Remove from heat, stir in vanilla.
Before inverting the cake, using a fork, poke holes all over the bottom of the hot cake. Slowly pour glaze over the bottom of the cake and let soak in and cool completely.
Take a knife and loosen the cake from pan, carefully going around the outer edge.
Invert cake from pan, and dust with powdered sugar.
Serve warm or at room temperature.
Optional to add a dab of fresh whipped cream and fresh raspberries. A fun cake for any season, but delightful for Valentine’s Day, especially if served with fresh raspberries or strawberries.