Preheat the oven to 375°F (190°C) and line a heavy-duty rimmed baking sheet with parchment paper.
Transfer the keto bread cubes into a high-capacity mixing bowl.
Distribute the extra virgin olive oil over the cubes and toss using a silicone spatula until the surface area is uniformly coated.
Sift the garlic powder, Italian seasoning, sea salt, and black pepper over the oil-coated cubes.
Agitate the bowl to ensure a homogenous distribution of dry seasonings across the bread matrix.
Arrange the bread cubes on the prepared baking sheet in a single layer, maintaining at least 1/2 inch of clearance between pieces to facilitate evaporative cooling and crisping.
Bake for 12 to 15 minutes, utilizing a spatula to toss the cubes at the 7-minute mark for even heat exposure.
Extract from the oven once the croutons achieve a deep golden hue and a rigid structure.
Allow the croutons to cool completely at room temperature on the tray to finalize the dehydration process and reach peak structural integrity.