Step 1

Preheat an air fryer to 360 degrees F (180 degrees C).

Step 2

Combine blueberries, flour, lemon juice, and salt in a small bowl. Toss to coat, then divide the mixture between two 1-cup ramekins.

Step 3

Combine oats, flour, brown sugar, and cinnamon for the topping in a small bowl. Mix in softened butter using a fork until mixture is crumbly. Sprinkle over the blueberries.

Step 4

Place the ramekins in the air fryer basket and cook until the blueberries are warmed throughout and topping is golden brown, 12 to 14 minutes.