Preheat the oven to 375°F and place the oven racks in the center.
Add your cubed pumpernickel bread to a large bowl.
Pour the melted butter over the bread cubes and give them a good toss until each piece is well-coated.
Arrange the bread in a single layer on a baking sheet.
Bake for 15-20 minutes, stirring halfway through, until the croutons are crunchy.
Let the croutons cool on the baking sheet.
Notes
Storage and Freezing InstructionsStorage: Store leftover croutons in an airtight container or plastic bag at room temperature for up to 1 week. These croutons also make a great snack right out of the container!Freezing: For longer storage, freeze the croutons in a plastic bag or airtight container. They’ll stay fresh for up to 3 months, making them easy to grab as a quick topping.Natalie's Pro Tip To make the most out of these delicious croutons, use a loaf of pumpernickel bread that’s slightly stale! Stale bread holds its shape better and results in croutons with a delightful crunch.And if you love a little extra flavor, toss in a sprinkle of kosher salt or garlic salt with the melted butter for an extra boost.