Preheat your oven to 350°F.
Grease a 9x11-inch baking dish to prevent sticking.
In a large bowl, whisk together the eggs, sugar, milk, heavy cream, vanilla extract, and cinnamon until smooth.
Make sure the sugar is fully dissolved.
Add the cubed bread into the mixture.
Gently fold in the bread until it’s soaked well with the custard.
Pour the bread mixture into the prepared baking dish.
Sprinkle raisins evenly over the top and drizzle the melted butter.
Bake in the oven for about 45 minutes or until the top is golden and the center is set.
Allow it to cool slightly before serving.