Generally, for standard slices of bread (about 3/4 to 1 inch thick) soak for approximately 20-30 seconds per side. For thick-cut bread (like brioche or challah, 1 to 1.5 inches thick): Approximately 1-2 minutes per side. For very thick or stale Bread: Approximately 2-3 minutes per side, depending on the dryness and thickness of the bread.