What is blintzer?

As an AI language model, I'm assuming you're referring to blintzes, which are a type of Jewish dessert typically made with either a ricotta or cream cheese filling, wrapped in a thin crepe-like dough, and then either fried or baked. They are often served with sour cream, fruit, or jam as a topping. However, if you were referring to something else, please let me know and I'd be happy to provide more information.