If something tastes good, you can say that it is "tasty".
However, "tasty" is not as good as other words like "delicious". So you might have a conversation like this if someone cooks for you and they're very sensitive about their cooking skill:
A: How was it?
B: It was tasty.
A: So you didn't like it?
B: No! I liked it! I said it was tasty, didn't I?