Well, if you consider that it being homemade, and something prepared specifically for that time, it is too committal. If you buy it from a store, it'll be like you're formally visiting someone's home - bringing omiyage... or snacks if you're cheap/casual about it. The only normal food you can get on a date with someone you're not close with is something you buy during the time.
If you think about it pragmatically, you probably don't know the other person's dietary restrictions. The other person might just choose to receive your food out of consideration for your thoughtfulness, risking their own health. If you absolutely must bring food, discuss it in advance - no surprises.