Preheat the oven to 350 degrees F (175 degrees C).
2
Tear bread into 1-inch pieces and place in an 8-inch square baking dish. Drizzle with melted butter and sprinkle with pecans and raisins.
3
Whisk milk, sugar, eggs, cinnamon, and vanilla extract together in a medium bowl until combined and pour over bread mixture in the baking dish. Press gently on the bread until saturated. Let sit for a few minutes.
