blintz (blĭnts) n. A thin, rolled blini, usually filled with cottage cheese, that is folded and then sautéed or baked and often served with sour cream.
[Yiddish blintse, from Belarusian blintsy, pl. of blinets, diminutive of blin, pancake, from Old Russian mlinŭ, blinŭ; see melə- in Indo-European roots.]