Preheat oven to 450 degrees.
Combine the butter and olive oil in a large bowl.
Add the cubes of bread, and toss until coated.
Sprinkle with salt, cayenne pepper, and black pepper; toss until evenly coated.
Spread the bread in a single layer on a baking sheet.
Bake until croutons are golden brown will take about 8-10 minutes then set aside.