Step 1: Preheat your oven to 300°F (150°C) and grease a 9x5-inch loaf pan.

Step 2: In a large mixing bowl, combine the cake mix, water, oil, and eggs. Mix together until well combined.

Step 3: Stir in the chopped nuts, if desired.

Step 4: Pour the batter into the prepared loaf pan and spread it evenly.

Step 5: Bake the cake in the preheated oven for approximately 75-80 minutes or until a toothpick inserted in the center comes out clean.

Step 6: Once the cake is done, remove it from the oven and allow it to cool in the pan for 10 minutes.

Step 7: Carefully remove the cake from the pan and place it onto a wire rack to cool completely.

Step 8: Once the cake has cooled, wrap it in plastic wrap and store it in the refrigerator until ready to serve.