Reheat French Toast in an Air Fryer

Doneness

Both faces are deep golden again with the egg-custard sheen back; the bread crumb is hot and soft to a fork tine in the centre (no cold seam in the middle); the cinnamon-sugar surface — if dusted on — has re-caramelised slightly to a faint mahogany edge. A torn-open piece releases visible steam and shows a soft moist crumb, not a dried-out cracker texture.

Technique

Pull the slices from the fridge 5 minutes before cooking — fully fridge-cold slices come out with a warm crust and a chilly centre. Load in a single layer with at least ½ inch between each so the convection wraps every face. No oil and no extra butter on the slice — the original butter / egg-custard is already in the bread crumb and re-melts during the cook. Flip at 2 minutes so both faces re-crisp; the top face that was sitting against the basket cover stays paler without a flip. For takeout slices that came drowning in syrup, blot the syrup off with a paper towel BEFORE loading — pooled syrup scorches in the basket and the smoke is bitter.

Watch out for

• !Drop to 325 °F (163 °C) and 3 minutes for thick brioche-style or stuffed french toast — the dense crumb holds more moisture and at 350 °F the surface darkens to scorch before the centre warms. The lighter Texas-toast or sandwich-bread style takes the full 350 °F / 4 min.
• !Blot pooled syrup off the slices BEFORE loading. Syrup scorches in 60 seconds at 350 °F and the smoke tastes bitter — also it bakes into the basket grate and turns into a 10-minute scrub.
• !Single layer non-negotiable. Stacked slices steam each other (bottom soggy / top dry); for more than 4, run two batches.
• !Do not reheat from frozen with this recipe — frozen french toast or frozen french toast sticks need their own cook (see French Toast Sticks for the frozen-stick variant; this entry is fridge-cold leftover slices only).