Preheat air fryer to 370 degrees F.: When you start, notice the basket warming and the air moving as the fryer reaches temperature. Preheating ensures the exterior of the bread begins to cook immediately, which helps form a crisp crust rather than letting the custard soak and make the bread mushy. If you skip preheating you may find the slices absorb too much liquid before browning, resulting in a soggy center. A quick tip is to let the unit run for a full five minutes so the chamber is uniformly hot, you will see the interior heat and sometimes smell a faint warmth that signals readiness.
In a large shallow bowl whisk together eggs, milk, cream, sugars, vanilla, cinnamon, and nutmeg.: The whisking should create a smooth, homogenous custard, with the sugars fully dissolved and the spices evenly distributed. Smell the mixture, you should get a warm, sweet aroma that hints at the final toast. Proper mixing matters because pockets of sugar or spice will create uneven flavor. A common mistake is under mixing which leaves grainy sugar, so whisk until the surface looks glossy and uniform.
Dip both sides of the bread into the egg mixture, soak for a few minutes.: As you submerge a slice, you will notice it darken slightly and feel heavier as it absorbs the custard. The goal is a gentle soak that penetrates to the center without saturating to the point of falling apart. The bread should be pliable and moistened but still hold its shape when lifted. Avoid dipping too briefly or the center will be dry, and do not over soak where the slice becomes sodden and tears.
Place the bread in the preheated air fryer basket and cook for 4 minutes, flip and cook for an additional 4-6 minutes or until the bread is golden and crispy in color.: The first side will firm up and start to brown, producing a soft crackle as the sugars caramelize. After flipping you will see the edges deepen in color and the top may develop small toasted spots. The sound is subtle, almost a faint hiss as moisture escapes. This step matters because even browning locks the custard inside and gives textural contrast. Watch for a deep golden hue; if it becomes too dark reduce time next round. A typical pitfall is crowding the basket, which blocks airflow and prevents that crisp exterior.
Repeat with other slices of bread.: As you work through the batch, you will notice the air fryer performance stays consistent if you avoid overfilling and allow heat to recover between loads. The subsequent batches benefit from a consistently hot chamber, producing the same golden finish. One thing to avoid is stacking slices, which leads to uneven cooking. Give each slice room and a little time for the hot air to do its job.
Serve with berries, powdered sugar, and maple syrup.: The aroma of warm spices will lift as you plate, and the contrast of bright berries, a dusting of powdered sugar, and the glossy pour of maple syrup completes the experience. The syrup adds a sticky sweetness, while berries bring freshness and acid. If you pour syrup too early it can soften the crisp edges, so I often serve the syrup on the side for those who want it. A common misstep is drenching the toast and losing the crisp texture, so add toppings mindfully.