Preheat your oven to 350°F. Melt your butter on the stove or in the microwave by heating on high in 20-second intervals, stirring in between until completely liquefied. Set melted butter aside to cool.
2 tablespoons unsalted butter
Cut your bread into cubes, about 1-inch long on each side, and set aside.
½ loaf stale bread, preferably white, challah, brioche, or French
In a large mixing bowl, whisk together milk, eggs, sugar, vanilla extract, salt and your cooled melted butter. Fold in your cubed bread and stir to coat.
2 cups milk, 2 large eggs, ⅓ cup granulated sugar, 1 teaspoon vanilla extract, ½ teaspoon salt
Fold in 1 cup of chocolate chips and transfer the mixture to a baking dish. You can use a 13.5-inch oval, an 11.5-inch square, or a 13 x 9-inch rectangular casserole dish.
1 ¼ cup chocolate chips
Sprinkle the remaining chocolate chips on top and bake for 40-45 minutes until the top starts to turn golden brown.