If you find that your banana pudding is too thin and you want to make it thicker, there are a few things you can try: Cornstarch: Mix 1-2 tablespoons of cornstarch with a small amount of cold milk or water until smooth. Add the mixture to the pudding and stir until combined. Heat the pudding over medium heat, stirring constantly, until it thickens to your desired consistency. Flour: Mix 1-2 tablespoons of flour with a small amount of cold milk or water until smooth. Add the mixture to the pudding and stir until combined. Heat the pudding over medium heat, stirring constantly, until it thickens to your desired consistency. Custard powder: Add a few tablespoons of custard powder to the pudding and stir until combined. Heat the pudding over medium heat, stirring constantly, until it thickens to your desired consistency. Instant pudding mix: Mix a small amount of instant pudding mix with cold milk until smooth. Add the mixture to the pudding and stir until combined. Allow the pudding to sit for a few minutes to thicken. Remember to add the thickener gradually and stir constantly to avoid lumps or the pudding becoming too thick. You can also adjust the amount of thickener depending on how thick you want the pudding to be.