Creating the Best Bread Pudding is simple if you follow these steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Grease a 9×13 inch baking dish.
2. Prepare Bread: In a large bowl, combine the cubed bread and melted butter. Toss to coat.
3. Make Custard Mixture: In another bowl, whisk together the eggs, milk, heavy cream, granulated sugar, vanilla extract, cinnamon, and nutmeg until smooth.
4. Combine: Pour the custard mixture over the bread cubes. Gently fold in the raisins or chocolate chips if using.
5. Let Soak: Allow the mixture to sit for about 15 minutes, letting the bread absorb the custard.
6. Transfer to Baking Dish: Pour the bread mixture into the prepared baking dish, spreading evenly.
7. Bake: Place the dish in the preheated oven and bake for 45-50 minutes or until the top is golden brown and a knife inserted in the center comes out clean.
8. Cool: Remove from the oven and let it cool for about 10-15 minutes before serving.
9. Dust with Powdered Sugar: For a final touch, dust the top with powdered sugar just before serving.

These steps will guide you in creating this incredible dessert effortlessly.