Step 1: Wash and Halve: Rinse the sprouts, peel off any outer rough leaves, and trim the bottom stem. Halve them — large ones into quarters, small ones just in half.
Step 2: Toss in Oil and Spices: Whisk the olive oil with the black pepper, garlic powder, and paprika. Add the sprouts and toss so the cut faces are coated — the cut face caramelizes through oil-conducted heat.
Step 3: Load the Basket: Spread the sprouts in a single layer, cut-side down (down against the hot air layer caramelizes hardest). No overlap. Set the air fryer to 190°C (375°F) for 14 minutes.
Step 4: Shake at the Halfway Mark: At 7 minutes, pull the basket out and shake to flip so the round side also colors. Browning edges mean caramelization.
Step 5: Balsamic Finish: Out of the basket, drizzle the balsamic and toss lightly (the heat wakes the fruit aroma), then scatter the optional salt substitute. Eat hot for maximum crunch.