The phrase "What Kind of Rice Cake Is This" refers to a Korean manhwa (comic) also known as "Lucky Strike" or "My Lucky Strike," featuring a character named Gong Siru and his college life

. Regarding the rice cake itself, the term "ggultteok" (꿀떡) is mentioned in related content as a type of Korean rice cake that is small, round, and stuffed with sweet syrupy honey or brown sugar

. This suggests that the rice cake referenced may be ggultteok, a traditional Korean sweet rice cake. So, "What Kind of Rice Cake Is This" is primarily a manhwa title, but the rice cake in question likely refers to ggultteok, a sweet Korean rice cake filled with syrup or honey.